How do I cite a paper I wrote for another class?

Treat it as an unpublished work. In APA that is your name, the year the paper was written, the title in italic sentence case, then Unpublished manuscript in square brackets, then the department and university. In MLA it is your name, the title in quotation marks and the date, with the course, the institution and the type of work as optional information at the end. In Chicago the entry ends with the words Unpublished manuscript and the date of the version you used. Permission to reuse the paper is a separate matter and it has to come first, because the reference does not grant it.

Do I have to cite my own unpublished work?

If you use it, yes. All three styles publish a form for unpublished work, which tells you they expect the earlier paper to appear as a source rather than as text that quietly reappears. Oxford states the published half of the rule directly: where earlier work by you is citable, meaning it has already been published, you must reference it clearly. For coursework, the citation is the thing that turns a reuse problem into an ordinary reference once permission is in place.

How do I cite my own thesis or dissertation?

In APA it depends on where the thesis lives. If a reader can get it from a database, an institutional repository or an archive, APA counts it as published and the bracketed description names the degree and the awarding university. If it can only be obtained from the institution itself, the description reads Unpublished doctoral dissertation or Unpublished master's thesis. MLA does not distinguish the two cases at all. Chicago puts the title in quotation marks followed by the degree, the university and the year. One exception in APA: an article based on your own dissertation acknowledges that in the author note instead of citing it.

Do I put my own name in the in-text citation?

The three styles disagree, so this is worth checking rather than guessing. Chicago says to build the reference entry as somebody else would write it but to use the first person in your prose, so you write that in your earlier paper you argued something rather than referring to yourself by surname. MLA lets you either include your name in the parentheses or leave it out, since the authorship is understood. APA publishes no exception, so your surname and the year appear exactly as another author's would. Pick the rule that belongs to the style you are writing in and stay with it.

How to cite your own previous paper

The CiteOwl Team· Updated 29 August 2026· 13 min read

Your earlier paper goes in the reference list like anybody else's, plus one element saying the reader cannot go and download it. Which element depends on what the work is: an assignment nobody published, an article carrying your name, a thesis, or data you collected. APA puts the status in square brackets after the title, MLA a description at the end of the entry, Chicago the words Unpublished manuscript and a date. Permission to reuse the work comes first and is the subject of its own page. This one is the formatting: four cases in three styles, quoted from the bodies that publish the rules. Library guides answer one case in one style, which is why you are on your fourth tab.

Contents

Four different objects, one question
The three styles side by side
A paper you wrote for another class
Work you published under your own name
Your thesis or dissertation
Data you collected yourself
Naming yourself, and what the styles leave open

Every form below is one a style body publishes, linked to the page it came from. Where two of them contradict each other, and they do, the contradiction is left visible rather than averaged into a house rule.

Four different objects, one question

"My own previous paper" covers at least four things, and they do not share a form.

Coursework. An essay or report you submitted for a class, which nobody published.
Published work. An article, chapter or conference paper under your name.
A thesis or dissertation. Published or unpublished depending on where a reader can get it.
Raw data. Survey responses or measurements you gathered and never released.

One property sorts them, the one a reference exists to serve: can the reader retrieve the thing. APA marks the boundary where the answer becomes no. Works that cannot be recovered "are cited in the text as personal communications", and those "are not included in the reference list; they are cited in the text only".

Your old essay sits just inside that boundary. Nobody can buy it, but someone could ask you or your department for a copy, so all three styles give it a full entry plus an element saying where it physically is, or when the version you read was written. That element is the whole difference.

MLA applies a permission rule to itself, which tells you what a class paper is: "In its publications, it is MLA policy to obtain permission from students before quoting from work they produced for class. Note that this does not extend to MA or PhD theses, which are public-facing works." It asks first, and the reference you are about to format is no substitute for doing the same.

The three styles side by side

Four cases, three styles, twelve cells. One of them is an honest blank.

What you are citing	APA 7	MLA 9	Chicago
A paper for another class	Title in italic sentence case, then [Unpublished manuscript], then department and university	Title in quotation marks, then the date, then course, institution and "student paper" as optional information	Title in quotation marks, then "Unpublished manuscript" and the date of the version
Your published article or conference paper	Identical to anyone else's article. Presentations take a bracketed description instead	Identical to anyone else's source, in MLA's own words	Identical to anyone else's source. Only the in-text form changes
Your thesis or dissertation	Published and unpublished take different brackets, decided by where a reader can get it	One form for both. MLA dropped the distinction in the eighth edition	Title in quotation marks, then the degree, the university and the year
Data you collected	[Unpublished raw data], dated by year of collection	No works-cited entry at all. Describe the method in the text	No published example in the free guidance

The pattern matters more than the cells. All three styles do one job in three slots. APA puts the status in brackets after the title, MLA at the end of the entry in the optional slot for a description of the source, Chicago where publication facts would sit, as a phrase and a date. Learn where your style keeps that slot and the rest writes itself. It is the same three-way split you meet when citing an AI tool.

The entry type you need is not "journal article", it is unpublished manuscript, thesis or dataset. The test is the one an annotated bibliography makes explicit: does the entry carry enough for a reader to find the thing, or to see why they cannot.

A paper you wrote for another class

APA is the most explicit of the three. Its post on unpublished works of 7 August 2025 sets one pattern for the whole family: after the title, "describe the status and type of the work in square brackets", and inside them "Only the first letter of text in bracketed text is capitalized". The source element, which for an article would name the journal, names the department and institution:

Yo, J., Minetti, K., Williams, G., & Taylor, P. (2025). Blame the robot: Writing challenges in the age of AI [Unpublished manuscript]. Department of English, University of Virginia.

Your own paper takes exactly that shape:

Halvorsen, M. (2025). Cooling centres and the shade gap in a warming city [Unpublished manuscript]. Department of Geography, Northbourne University.

Two details people get wrong. The date is "the year the work was completed, the year the draft was written", not the year you are reusing it. And status words stay out of that slot: APA says not to use words like submitted "in the date element of the reference".

MLA moves the description to the end of the entry. Its answer on citing an unpublished student paper says the entry "should include the author, title of the paper (in quotation marks), and date", and that "the name of the course, the institution for which the paper was prepared, and the type of work can be provided as optional information at the end". Its example:

Leland, Dina. "Designing websites with Preschool Learners in Mind: Two Approaches Compared." 4 Sept. 2017. User Experience 101, Dunham College, student paper.

Chicago sends you to its unpublished manuscript form, and the Q&A that says so answers this exact reader: an instructor whose students "do get permission to cite their previous papers/essays". Students "would cite their own work as if they were referring to themselves in the third person", the editors reply, and "Assuming these previous papers or essays are unpublished, follow the format for citing an unpublished manuscript". Their example:

Smith, Jamelle. "Bartleby's Refusal as Gen X Flex." Unpublished manuscript, August 3, 2021.

Notice what Chicago dates. Not the course, the version, which for a file you have edited since is the only thing in the entry pinning down which draft you mean.

None of these forms removes a text match. If the earlier paper sits in a repository, your new submission still matches it, and the reference explains the overlap rather than preventing it, since a similarity number carries no opinion about authorship. That is the general point of what a good similarity score is.

Work you published under your own name

The easy case, with the clearest rule attached. Oxford's guidance on plagiarism, under the heading auto-plagiarism, puts it in a line: "Where earlier work by you is citable, i.e. it has already been published, you must reference it clearly."

Clearly means normally. No bracket, no marker, no note that you are the author, because the author element says so. MLA puts it outright in its answer on citing your own work: "In the works-cited list, authors should cite their own work the same way they would cite any other source." APA and Chicago agree. Only the in-text half changes.

A conference paper can be three objects. In published proceedings, cite the proceedings entry, an article or a chapter. If it was a talk and nothing more, APA gives it a bracketed description from the same family, "[Conference presentation]" or "[Paper presentation]", with the meeting's full dates, name and location. Chicago keeps papers presented at meetings in their own section, 14.115.

Then the exception nobody mentions, which matters if you are turning a thesis into an article. APA's page on self-plagiarism permits "publishing a work of limited circulation in a venue of wider circulation", then says something counterintuitive: "In such cases, authors would not cite their dissertation or thesis in the article text but rather acknowledge in the author note that the work was based on their dissertation or thesis." Do not cite it. The reasoning is on the same page: self-plagiarism "deceives readers by making it appear that more information is available on a topic than really exists", and citing your own thesis inside an article drawn from it presents one piece of research as two.

Your thesis or dissertation

APA splits this case by retrievability. A thesis "is considered published" when it is available from a database such as ProQuest Dissertations and Theses Global, an institutional repository or an archive. Otherwise it is unpublished, and APA's rule is to "include the description [Unpublished doctoral dissertation] or [Unpublished master's thesis] in square brackets after the dissertation or thesis title", naming the awarding institution as the source. Undergraduates too: the format "can be adapted for other unpublished theses, including undergraduate theses, by changing the wording of the bracketed description as appropriate".

Halvorsen, M. (2025). Shade provision and heat exposure on school routes [Unpublished master's thesis]. Northbourne University.

Halvorsen, M. (2025). Shade provision and heat exposure on school routes [Master's thesis, Northbourne University]. ProQuest Dissertations & Theses Global.

MLA does not make the distinction, and says so: "In a change from the previous edition of the MLA Handbook, we do not distinguish between published and unpublished dissertations." The entry is author, title and date, then the institution and a description as optional elements, with a repository as a second container if that is where you read it. The title is italic, because a thesis is a stand-alone work.

Halvorsen, Mira. Shade Provision and Heat Exposure on School Routes. 2025. Northbourne U, master's thesis.

Chicago's free citation guide gives the shape, and it does the opposite of MLA with the title: quotation marks, not italics.

Halvorsen, Mira. "Shade Provision and Heat Exposure on School Routes." Master's thesis, Northbourne University, 2025.

Consulted through a database, it takes the database and its number at the end. A thesis is the one item here that is unambiguously public, since MLA's carve-out calls MA and PhD theses "public-facing works". Quoting your own is no different from quoting a stranger's. If you are at the front of that job rather than the back, writing a bachelor thesis covers the structure.

Data you collected yourself

Here the styles genuinely disagree, and averaging them leaves you with something neither endorses.

APA gives your data an entry like anything else. The bracket reads "[Unpublished raw data]", the date is the year the data were collected rather than the year you wrote them up, and a collection spanning years takes both joined by an en dash. When the author is also the source, the entry stops after the bracket. An untitled set takes a bracketed description of its contents instead of a title.

Halvorsen, M. (2025). Street-level temperature logs from twelve school routes [Unpublished raw data]. Department of Geography, Northbourne University.

MLA tells you not to write an entry at all. Its guidance on citing raw data you collected is explicit: for a survey you designed and distributed, "clarify the data source in the body of the report instead of creating a works-cited-list entry for the survey", explaining how you distributed it and how you collected and sorted responses. Making the instrument available is good practice, "either by including it as an appendix to your report or by providing a link to it in an endnote".

Neither is careless. MLA points a reader at a container they can go to, and when you are the container there is nothing to point at, so the methods section carries the load. APA keeps a list of retrievable records, and would rather print an entry with an incomplete address than leave the data out. Chicago's section for databases and datasets, 14.157, sits behind a subscription, and its free guidance publishes no example for data you gathered yourself.

In practice: in MLA write the methods paragraph and the appendix, in APA do both, since the entry does not excuse you from describing the collection.

Naming yourself, and what the styles leave open

The reference entry is the half everyone asks about. The in-text half is where the styles diverge, and a marker reads it first.

Style	In the text
Chicago	Third person in the entry, first person in the prose. Its example runs: In "Bartleby's Refusal as Gen X Flex," I suggest that, and it marks "Smith suggests that" as wrong
MLA	Your choice. Authors "may include their names in the parentheses" so the citation keys to the list, "or they may omit their names, since the authorship is understood". In prose they "may refer to themselves with pronouns"
APA	No exception published. The parenthetical and narrative forms carry your surname and the year, exactly as another author's would

A sentence that is correct in Chicago is wrong in APA and optional in MLA. If your instructor names a style, that settles it. If nobody has, the form that works in all three is to name the earlier paper in your prose and cite it normally.

Now the parts nobody has settled, because every other page on this subject writes as though the rules were complete. MLA's published answers on this whole family, the student paper, the dissertation and self-citation alike, carry the Style Center's banner saying they relate to the eighth edition of the handbook. As of 29 August 2026 there is no ninth-edition replacement for any of them. The shapes survive the change, since the ninth edition keeps the elements they use, but you are following examples MLA has not restated. Chicago is in the same position: its Q&A footnotes that the answer relies on the seventeenth edition and links to section 14.216 there, while the eighteenth moved unpublished manuscripts to 14.114 and put the text behind a subscription. The free citation guide covers thirteen source types and an unpublished manuscript is not one.

The gap that will bite you is different. None of the three publishes a rule for the case students are actually in, which is not quoting the old paper but reusing its sentences. APA alone goes near it, narrowly: authors may sometimes "duplicate their previously used words without quotation marks or citation", the example being the details of an instrument, and only "when the duplicated material is limited in scope". Past that the styles stop and your institution's rules take over, which is where how to avoid plagiarism picks up.

The practical version is three moves. Ask before you reuse, cite the earlier work in the form its category takes, and say in the text which part is carried over.

Keeping a source attached to the sentence it supports is what CiteOwl is built to do. It searches OpenAlex, CrossRef, Unpaywall and the web, reads what it retrieves, writes each claim from a passage it keeps beside the sentence, and hands you every edit as a diff you accept or reject. Your earlier work then sits in the list with everything else you cite.