Your course handbook says “use Harvard referencing”, your library’s guide says one thing, the referencing software says another, and a friend at a different university does it differently again. Which Harvard is right? The one your own university publishes. Harvard referencing is an author-date system with no central authority: unlike APA, there is no manual that every institution follows, so each library issues its own version, and the differences are small but visible to a marker.
This article is part of our guide How to Write a Master’s Thesis by the Mastermind PhD team and relates to our Academic Proofreading & Review service. Sources last checked: November 2026.
This guide sets out how Harvard referencing works, the in-text rules, the reference list patterns for the five source types a thesis uses most, a comparison of the Sheffield, Imperial College London and Leeds guides we checked in October 2026, a worked example, and the mistakes that cost marks most often.
What is Harvard referencing? Harvard is a family of author-date referencing styles. A source is cited in the text by the author’s surname and the year of publication, and its full details appear once in a single alphabetical reference list at the end of the thesis. No organisation owns the style, so universities publish their own versions, many of them based on the handbook Cite Them Right (Pears and Shields, 2022). The patterns below are therefore patterns; the punctuation that counts is the one in your institution’s guide.
How does Harvard referencing differ from APA and from numeric styles?
| Feature | Harvard (typical UK version) | APA 7 | Numeric styles (Vancouver, IEEE) |
|---|---|---|---|
| In-text form | (Smith, 2017) or Smith (2017) | (Smith, 2017) or Smith (2017) | [1] or a superscript number |
| Two authors | “and” in most UK versions; Imperial uses “&” | “&” in brackets, “and” in the sentence | Numbers only |
| et al. | From four authors at Sheffield; Imperial allows it from three | From three authors | Varies by style |
| Year in the list | In brackets after the author: Smith, J. (2017) | In brackets after the author, followed by a full stop | Often at the end of the entry |
| Titles | Whole works in italics; article and chapter titles in single quotation marks in many versions | Sentence case, no quotation marks | Abbreviated journal names |
| Web sources | Access date required | Retrieval date only for content that changes | Access date usually required |
| DOI | “doi:” prefix at Sheffield; bare https://doi.org link at Imperial | https://doi.org/ link | DOI or URL |
| Authority | University guide, often based on Cite Them Right | Publication Manual | ICMJE recommendations, IEEE manual |
How do you cite in the text?
The examples below come from the Sheffield and Imperial guides; Leeds Harvard follows the same logic with its own punctuation, such as (Stone and Collins, 2012) and (Civaner and Arda, 2008, p.267) with no space after “p.”.
| Situation | Sheffield Harvard | Imperial Harvard | Note |
|---|---|---|---|
| One author | (Smith, 2017) or Smith (2017) | (Henderson, 2005) or Henderson (2005) | Identical |
| Two authors | (Wallace and Wolf, 2006) | (Arrami & Garner, 2008) | “and” versus ampersand |
| Three authors | All three named: (Greig, Taylor and MacKay, 2013) | All three, or et al. after the first | Threshold differs |
| Four or more | (Begg et al., 2014), et al. italicised | (van Alphen et al., 2007) | Italics differ |
| No author | Title in italics in place of the author | Corporate author, or “Anon” | Both discourage anonymous web sources |
| No date | (Wells, no date) | “no date” or “n.d.” | State it, do not guess a year |
| Direct quotation | (Smith, 2017, p. 42) | Page after the year, as in (2001:p.4) | Page punctuation varies |
| Secondary source | (Ecott, 2002, cited in Wilson, 2009); only Wilson in the list | “as cited by”; only the source you read in the list | Find the original where possible |
| Same author, same year | 2017a, 2017b | 2008a, 2008b | Letters follow the order in the list |
| Several sources at once | Separated by semicolons, in chronological order | Separated by semicolons | Order varies between guides |
Two rules hold in every version: cite every idea you quote, paraphrase or summarise, and give a page number for every direct quotation. Leeds also asks for page numbers when you paraphrase a specific idea or reproduce a table or diagram.
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How do you build the reference list?
The reference list is a single alphabetical list, ordered by the surname of the first author, containing every source cited in the text and nothing else. A bibliography of works consulted but not cited is a separate, optional list that some handbooks request. Titles of whole works (books, journals, websites, theses) are italicised; the edition is given only when it is not the first; entries are not numbered. The patterns below follow the Sheffield guide, with Imperial’s variants noted.
| Source | Pattern (Sheffield Harvard) | Example |
|---|---|---|
| Book | Surname, I. (Year) Title. Edition (if not the first). Place: Publisher. | Field, A. (2018) Discovering statistics using IBM SPSS statistics. 5th edn. London: SAGE. |
| Chapter in an edited book | Surname, I. (Year) ‘Chapter title’, in Editor, I. (ed.) Book title. Place: Publisher, pp. first–last. | Braun, V. and Clarke, V. (2012) ‘Thematic analysis’, in Cooper, H. (ed.) APA handbook of research methods in psychology: Vol. 2. Research designs. Washington, DC: American Psychological Association, pp. 57–71. |
| Journal article | Surname, I. (Year) ‘Article title’, Journal Title, Volume(Issue), pp. first–last. doi: https://doi.org/… | Tavakol, M. and Dennick, R. (2011) ‘Making sense of Cronbach’s alpha’, International Journal of Medical Education, 2, pp. 53–55. doi: https://doi.org/10.5116/ijme.4dfb.8dfd |
| Web page | Author or Organisation (Year) Title of page. Available at: URL (Accessed: day month year). | University of Manchester (2026) Presentation of theses policy. Available at: https://documents.manchester.ac.uk/display.aspx?DocID=7420 (Accessed: 11 October 2026). |
| Thesis or dissertation | Surname, I. (Year) Title. Award and type of qualification. Awarding body. | Form used at Sheffield: … Title. MA Dissertation. University of Sheffield. Form used at Imperial: … Title. PhD thesis. Imperial College London. |
Imperial’s patterns differ in detail: “5th ed.” rather than “5th edn.”, a comma between place and publisher, the DOI as a bare link with no “doi:” prefix and no access date, and web sources as “URL [Accessed 15th June 2015]” rather than “Available at: URL (Accessed: …)”. Imperial also orders several works by the same author with the most recent first, where many other guides use the oldest first. None of these differences in Harvard referencing is a matter of correctness; each is a matter of matching the guide you were told to follow.
Why does Harvard referencing vary, and how do you handle it?
Harvard grew from a nineteenth-century citation practice rather than from a published manual, so there has never been one edition to point to. Libraries wrote their own guides, publishers wrote theirs, and the handbook Cite Them Right became the most common reference point without becoming compulsory. The result is that three well-run university guides disagree on the ampersand, the et al. threshold, the edition abbreviation, the colon or comma before the publisher, the DOI prefix and the access-date wording, as the tables above show.
The handling is straightforward:
Use the guide named in your programme handbook. If it names none, use your university library’s guide; if your department has its own, that version wins.
Follow one version only, in every chapter, including the appendices.
Set your reference manager to a matching style. Zotero, Mendeley and EndNote offer a Cite Them Right Harvard style, and several UK libraries publish a style file for their own variant; check the output against the guide, because the software applies a style but does not know which one your handbook meant.
Record the access date for every web source on the day you read it, in the format your guide uses.
When the guide is silent on a source type, use the nearest pattern and apply its punctuation consistently; Leeds gives exactly this advice.
Worked example: three entries, before and after
A student drafted these entries from memory and from mixed sources:
- Field, A. (2018). Discovering Statistics Using IBM SPSS Statistics. 5th ed. Sage Publications, London.
- Tavakol M, Dennick R. Making sense of Cronbach’s alpha. Int J Med Educ 2011;2:53-5.
- University of Manchester. Presentation of theses policy. Retrieved from https://documents.manchester.ac.uk/display.aspx?DocID=7420
The first entry is APA-flavoured (a full stop after the year, title case, publisher before place); the second is Vancouver; the third uses the APA 6 phrase “Retrieved from” and has no year or access date. Rewritten in the Sheffield version:
- Field, A. (2018) Discovering statistics using IBM SPSS statistics. 5th edn. London: SAGE.
- Tavakol, M. and Dennick, R. (2011) ‘Making sense of Cronbach’s alpha’, International Journal of Medical Education, 2, pp. 53–55. doi: https://doi.org/10.5116/ijme.4dfb.8dfd
- University of Manchester (2026) Presentation of theses policy. Available at: https://documents.manchester.ac.uk/display.aspx?DocID=7420 (Accessed: 11 October 2026).
In the text they appear as (Field, 2018), as (Tavakol and Dennick, 2011, p. 54) where a sentence is quoted, and as (University of Manchester, 2026). Three entries took ten minutes to correct; a reference list of eighty entries in three styles takes a day, which is why the Harvard referencing version is chosen before the first chapter is written.
Which Harvard referencing mistakes do markers flag?
- Mixing two versions, usually the library’s guide and the reference manager’s default.
- Quotations without page numbers, or paraphrases of a specific passage without them where the guide requires them.
- “et al.” applied to two authors, or all four authors listed in the text.
- Capitalising every word of a book title in a guide that uses sentence case, or the reverse.
- “Retrieved from”, “doi:” or “[Online]” imported from another style.
- Web sources without an access date, or DOI articles given an access date they do not need.
- A secondary source cited as if it had been read.
- Sources cited in the text but missing from the list, and entries in the list that are never cited.
- Inconsistent spelling of one author’s name between the text and the list.
- Italics on the article title instead of the journal title.
How do reference managers help, and where do they fail?
A reference manager removes the mechanical work of Harvard referencing: it stores the metadata once, inserts citations as you write, and builds the list in the chosen style. It fails in predictable ways. Metadata imported from a database arrives in title case or with a missing issue number; a web page lacks an author and a date; a thesis imported as a “report” is formatted wrongly; and the Harvard style selected may not be the version your handbook names.
The method that works is to clean each record when you add it, choose the closest Harvard style, and check the final list entry by entry against the guide before submission. Our comparison of Zotero, Mendeley and EndNote and our Zotero guide for thesis writing cover the set-up.
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Frequently asked questions
Is there an official Harvard referencing style?
No. Harvard is a family of author-date styles with no governing body. The version that is official for you is the one your university or department publishes, which is often adapted from Cite Them Right.
Do I need page numbers when I paraphrase?
Guides differ. Sheffield asks for page numbers for quotations and specific points; Leeds asks for them when you paraphrase a specific idea or explanation, or use an image, diagram or table. If your guide is silent, include the page number for any specific passage; markers rarely object to a page number.
How do I cite a source with no author or no date?
With no author, Sheffield puts the title in italics in place of the author, and Imperial uses the organisation or “Anon”; with no date, write “no date” or “n.d.” as your guide prefers. Check first whether an organisation is the author, which is usually the case for web pages.
Should the reference list include everything I read?
No. The reference list contains only sources cited in the text. Works consulted but not cited belong in a separate bibliography, and only if your handbook asks for one.
Can I use “et al.” for three authors?
At Sheffield, all three names are given and “et al.” starts at four authors; at Imperial, “et al.” is acceptable from three. Follow your guide, and whichever threshold applies, use it in every citation.
Sources
- University of Sheffield Library. Harvard referencing (Research skills and critical thinking). https://librarydevelopment.group.shef.ac.uk/referencing/harvard.html (accessed October 2026)
- Imperial College London, Library Services. Harvard style: Citing and Your reference list and bibliography. https://www.imperial.ac.uk/admin-services/library/learning-support/reference-management/harvard-style/citing/ ; https://www.imperial.ac.uk/admin-services/library/learning-support/reference-management/harvard-style/your-reference-list/ (accessed October 2026)
- University of Leeds Library. Leeds Harvard introduction and Leeds Harvard referencing examples. https://library.leeds.ac.uk/info/1402/referencing/50/leeds-harvard-introduction ; https://library.leeds.ac.uk/referencing-examples/9/leeds-harvard (accessed October 2026)
- Pears, R., & Shields, G. (2022). Cite Them Right: The Essential Referencing Guide (12th ed.). Bloomsbury Academic.
- University of Manchester. (2026, March). Presentation of Theses Policy. https://documents.manchester.ac.uk/display.aspx?DocID=7420 (accessed October 2026)
Sources last checked: November 2026. This article is general educational guidance and does not replace your university regulations or your supervisor’s instructions. How we prepare our content.