How to Cite a Dissertation or Thesis

We use one running example throughout — a doctoral thesis found in an online repository:

The anatomy of a thesis reference

A thesis citation is built from the familiar who-when-what-where, with two extra elements that no other source type has: the type and level of the work (a Master's dissertation, a PhD thesis) and the awarding institution. The full set of facts is therefore: the author, the year it was completed or awarded, the title, the degree type and level, the institution that awarded the degree, and — if you read it online — the database or repository and its URL. Collect these and the thesis slots into any style.

The degree level matters because it signals how much weight the work carries. A doctoral thesis has been examined by experts and defended in a viva; a Master's dissertation has been marked but examined less rigorously; an undergraduate dissertation less so again. Recording the level honestly is therefore not just a formatting requirement — it tells your reader something real about the authority of the source.

Published vs unpublished theses

Styles distinguish between a thesis that is publicly available — held in a database such as ProQuest or EThOS, or in an institution's open repository — and one that is unpublished, consulted only in print at a single library. For an available thesis you add the database or repository and the URL, treating it much like a published work, because your reader can retrieve it. For a genuinely unpublished thesis, you note that it is unpublished and give the institution, since the library that holds it is the only way to find it. In practice almost every recent thesis you cite will be the available kind, because universities now deposit theses online by default.

APA 7

APA gives the type and institution in square brackets after the title, then the database:

In-text: (Okafor, 2020). See our APA guide.

MLA 9

MLA italicises the title, then describes the work and its institution:

In-text: (Okafor). See our MLA guide.

Harvard

Harvard (Cite Them Right) gives author–date, the type, the institution and access details:

In-text: (Okafor, 2020). See our Harvard guide.

Chicago

In Chicago's Notes–Bibliography system, the thesis appears as a footnote and bibliography entry:

See our Chicago guide.

Vancouver

Vancouver numbers the source and notes the type in brackets:

See our Vancouver guide.

IEEE

IEEE uses a bracketed number and the "Ph.D. dissertation" descriptor:

See our IEEE guide.

ProQuest, EThOS and repositories

Most theses you cite will come from one of a few places, and knowing them helps you find the details. ProQuest Dissertations & Theses is the large international database, common for North American work; EThOS (the British Library's e-theses service) is the UK equivalent; and most universities run their own institutional repository that holds their students' theses openly. Each gives you a record with the author, title, degree, institution and year, and a stable URL or identifier to include in your reference. When a thesis is held in such a database, treat it as available and add the database name and URL; the database is what makes the work retrievable for your reader, which is the whole purpose of the citation. Where a DOI is provided — increasingly common in repositories — give it in preference to a URL, since it is permanent.

Should you cite a thesis at all?

Theses are legitimate, citable sources, and doctoral theses in particular can be valuable — they are examined by experts, often contain original data, and may cover a niche topic no published paper addresses. But they sit a step below peer-reviewed journal articles in the hierarchy of evidence, because a thesis is examined by a small panel rather than reviewed and published by a journal. The sensible approach is to use theses where they genuinely add something — original findings, a detailed literature review, a method you want to follow — while preferring published, peer-reviewed sources for your central claims where they exist. An undergraduate or Master's dissertation carries less authority than a doctoral one, so weigh the level when you decide how much to rely on it. Citing a thesis well is partly about formatting and partly about judgement: include it because it strengthens your argument, not merely because it was easy to find.

Getting the in-text citation right

A thesis is cited in the body of your essay exactly like any other source in its style — the special elements (the degree, the institution) live in the reference-list entry, not in the in-text citation. So in the author–date styles you give the author and year — (Okafor, 2020) in APA and Harvard — while MLA gives the author alone or with a page for a quotation — (Okafor 88). The numbered styles, Vancouver and IEEE, again use a figure, and Chicago's Notes–Bibliography system puts the full thesis citation in a footnote. There is nothing thesis-specific to remember at the in-text stage, which is reassuring: once the reference-list entry is right, the in-text citation follows the ordinary rules of your style.

As always, a direct quotation from a thesis needs a page number (or, for an online thesis with stable pagination, the PDF page), because the citation must point the reader to the exact passage you used. Theses are long documents, often running to hundreds of pages, so a precise pinpoint matters even more than usual — a reader should be able to turn to the specific page your claim rests on rather than searching a 300-page document.

A method for any thesis

Approach every thesis the same way and citing it becomes routine. Step one: collect the facts from the title page and the database record — author, year, full title, degree type and level, awarding institution, and the database or repository with its URL or DOI. The database record is usually the easiest single place to find all of these accurately. Step two: decide whether the thesis is available or unpublished — almost all recent theses are available online, so you will normally add the repository and URL.

Step three: identify your style's family (author–date, author–page, footnote or numbered) so you know how the in-text citation works and how the reference list is ordered, and place the degree and institution where your style wants them — in square brackets after the title in APA, after the date in Harvard, in a footnote in Chicago. Step four: add the matching in-text citation and check the two halves agree. Run this routine a couple of times and the only thing that distinguishes a thesis from a book, in practice, is remembering to include the degree level and institution — which is exactly the detail this guide exists to fix in your mind.

Theses and the wider grey literature

A thesis is one example of what scholars call grey literature — work that is produced and made available outside the conventional commercial publishing of journals and books. Alongside theses, grey literature includes government and organisational reports, working papers and preprints, conference papers, policy briefs, and datasets. These sources share two features with theses: they often contain valuable, detailed or very current material you will not find in a journal, and they have usually not been through the same peer-review process as a published article, so they sit a little lower in the hierarchy of evidence.

The citation logic for all grey literature is the same as for a thesis: identify who is responsible, when it appeared, what it is called, what type of document it is, and where to find it — then give that type explicitly (a "[Working paper]", a "[Report]", a "PhD thesis") so the reader knows what they are looking at. And the judgement is the same too: use grey literature where it genuinely strengthens your argument with data or detail a published source cannot offer, while preferring peer-reviewed work for your central claims. Knowing how to cite a thesis therefore equips you for a whole category of sources that a serious literature review will inevitably draw on.

Where to search for theses

Citing a thesis well begins with finding a good one, and theses are easy to overlook precisely because they sit outside the journal databases students search first. Knowing where they live makes them a genuine asset to a literature review. For UK work, the British Library's EThOS service indexes theses from across British universities, and most institutions also run an open institutional repository — searchable directly, and increasingly indexed by Google Scholar — that holds their own students' work. For international and especially North American theses, ProQuest Dissertations & Theses is the major database, usually accessible through your university library. There are also open aggregators such as the Networked Digital Library of Theses and Dissertations and OpenDOAR that gather repositories worldwide.

A practical research tip: when you find a published article on your topic that began life as a thesis — which is common, since researchers often turn their doctoral work into papers — the original thesis frequently contains far more detail than the article, including fuller literature reviews, complete datasets and methodological appendices that the journal version had to cut for length. Tracking down that thesis can give you material you simply will not find in the published paper, and it is exactly the kind of resourceful searching that strengthens a dissertation of your own.

Whatever route you use, take the citation details from the official record rather than from a cover or a second-hand mention, so that the author, title, degree, institution and year are accurate. And weigh what you find: a recent doctoral thesis from a recognised institution, deposited in a reputable repository, is a credible source worth citing, while an undergraduate dissertation found on an unfamiliar website warrants more caution. Finding theses is a skill that repays itself, both in the quality of evidence you can bring to an argument and in the example a well-structured thesis offers for your own long-form writing.

Common mistakes to avoid

• Omitting the degree type and level (PhD thesis, Master's dissertation) — it is a required element.
• Leaving out the awarding institution.
• Treating an online repository thesis as unpublished, or vice versa.
• Forgetting the database/repository and URL for an online thesis.
• Citing an undergraduate dissertation as though it carried the authority of a doctoral thesis.
• Relying on a thesis for a central claim when a peer-reviewed source is available.

Collect the author, year, title, degree level, institution and source, decide whether the thesis is available or unpublished, and it slots cleanly into any style. When a literature review reaches into theses and reports as well as journals, our writers will reference every source type correctly in your required style.

Frequently asked questions

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