Knowing how to cite a dissertation or thesis trips up many students, because the rules change depending on whether the work was published in a database or institutional repository or remained an unpublished manuscript on file at a single university. The good news is that all three major styles, APA, MLA, and Chicago, follow a predictable pattern once you know which details to gather. This guide walks through the published versus unpublished distinction, gives you worked examples in each style, and shows the in-text forms so your readers can find the source again.
Published vs. unpublished: the key distinction
The single most important decision when citing a dissertation is whether it counts as published or unpublished. A dissertation is treated as published when it is accessible through a commercial database (such as ProQuest Dissertations and Theses) or an open institutional repository, and you note that source. It is treated as unpublished when you obtained it directly from the awarding university and it is not freely available online.
This matters because the format differs in small but graded ways. For published works you include the database or repository name (and a URL when one exists). For unpublished works you simply describe the degree and the institution that holds the document. Getting this right is part of broader good practice in how to cite sources accurately and avoiding accidental plagiarism.
Information you will need
For any dissertation citation, collect the author’s name, the year the degree was awarded, the full title, the type of work (doctoral dissertation or master’s thesis), the name of the awarding university, and, for published works, the database or repository plus URL. A dissertation is unpublished primary research, so treating it carefully is similar to handling other primary vs. secondary sources.
How to cite a dissertation in APA (7th edition)
In APA, the reference begins with the author, the year in parentheses, the title in italics and sentence case, and a square-bracket description noting the degree type and the awarding institution. For published dissertations, end with the database name. APA places the university inside the brackets, not in the source position. You can speed this up with the APA citation generator, then check the result against the examples below. For a refresher on the wider format, see the APA format guide.
Reyes, M. T. (2021). Coastal wetland restoration and community resilience in the Gulf region [Doctoral dissertation, University of Example]. ProQuest Dissertations and Theses Global.
In-text: (Reyes, 2021).
If the published dissertation comes from an institutional repository with a stable URL, give the repository name and the link instead of a commercial database:
Okafor, D. (2020). Machine learning approaches to early sepsis detection [Doctoral dissertation, Example State University]. ExampleU Institutional Repository. https://repository.example.edu/items/12345
In-text: (Okafor, 2020).
An unpublished dissertation or thesis omits the database and repository entirely. The bracketed description still names the degree and the institution:
Lindholm, A. R. (2019). Teacher narratives in rural multigrade classrooms [Unpublished master’s thesis]. University of Example.
In-text: (Lindholm, 2019).
Like all APA references, dissertation entries belong on a hanging-indented APA reference page, and the in-text citation uses the author-date form covered in the APA in-text citations guide.
How to cite a dissertation in MLA (9th edition)
MLA 9 treats a dissertation as a self-contained work. List the author as Last, First, put the title in italics and title case, then add the degree, the awarding institution, and the year. When you accessed the work through a database, that database becomes the container, named in italics, followed by the URL with the https:// removed. Build and verify the entry with the MLA citation generator, and consult the MLA format guide for layout details.
Reyes, Maria T. Coastal Wetland Restoration and Community Resilience in the Gulf Region. 2021. University of Example, PhD dissertation. ProQuest Dissertations and Theses Global, www.example.com/docview/123456789.
In-text: (Reyes 142).
For an unpublished dissertation consulted directly, drop the database container and simply describe the work:
Lindholm, Anna R. Teacher Narratives in Rural Multigrade Classrooms. 2019. University of Example, Master’s thesis.
In-text: (Lindholm 58).
Note that MLA in-text citations use the author and a page number with no comma and no year, as explained in the MLA in-text citations guide. The finished entry goes on your MLA works cited page.
How to cite a dissertation in Chicago (17th/18th edition)
Chicago offers two systems. In notes-bibliography style you write a full footnote the first time, a shortened note afterward, and a matching bibliography entry. The degree type and institution appear in parentheses with the year. Use the Chicago citation generator to assemble these, and see the Chicago style guide for full rules.
Bibliography: Reyes, Maria T. “Coastal Wetland Restoration and Community Resilience in the Gulf Region.” PhD diss., University of Example, 2021. ProQuest (123456789).
Full note: 1. Maria T. Reyes, “Coastal Wetland Restoration and Community Resilience in the Gulf Region” (PhD diss., University of Example, 2021), 142.
Shortened note: 2. Reyes, “Coastal Wetland Restoration,” 150.
Chicago puts the dissertation title in quotation marks rather than italics, because it is treated like an unpublished work even when retrieved from a database. For an unpublished thesis with no database, omit the final database element:
Bibliography: Lindholm, Anna R. “Teacher Narratives in Rural Multigrade Classrooms.” Master’s thesis, University of Example, 2019.
Full note: 1. Anna R. Lindholm, “Teacher Narratives in Rural Multigrade Classrooms” (master’s thesis, University of Example, 2019), 58.
Chicago’s author-date variant pairs an in-text citation with a reference list entry instead of footnotes:
Reference list: Reyes, Maria T. 2021. “Coastal Wetland Restoration and Community Resilience in the Gulf Region.” PhD diss., University of Example. ProQuest (123456789).
In-text: (Reyes 2021, 142).
If your instructor requires the closely related Turabian rules, the Turabian citation generator follows the same logic with student-paper formatting.
Common mistakes to avoid
A few errors show up again and again. First, mislabeling published and unpublished works: if you found it in ProQuest or a repository, it is published and needs that source. Second, forgetting the degree description, which tells readers it is a dissertation rather than a book. Third, applying the wrong title treatment: APA and MLA italicize the title, but Chicago uses quotation marks. Fourth, omitting the page number in MLA and Chicago in-text citations, which differs from APA’s author-date pattern. If you are unsure when to abbreviate multiple authors, the et al. explainer and the guide to citing multiple authors can help. Comparing the systems side by side in citation styles explained also clears up confusion.
Conclusion
Once you can tell a published dissertation from an unpublished one, citing it becomes routine: gather the author, year, title, degree type, and institution, then add the database or repository only when the work is published. APA and MLA italicize the title while Chicago quotes it, and each style has its own in-text form. When you want a clean, formatted entry in seconds, run your details through the APA citation generator or its MLA and Chicago counterparts, then proofread against the examples here. For related work, see how to handle a conference paper, a chapter in a book, or a standard journal article.