Harvard referencing is an author-date style. You credit a source in the body of your text with the author’s surname and the year in brackets, such as (Smith, 2020), and then list the full details of every source in a reference list at the end. The citation generator builds both parts for you, but it helps to understand the format so you can check the result.
One thing to know up front: “Harvard” is not a single fixed standard. It is a family of variants, and universities adapt the punctuation and layout to their own house style. The rules below describe the common form, but if your department gives you a referencing guide, follow that where it differs.
How the author-date system works
Harvard has two parts that work together. A short in-text citation points to a source, and a full reference at the end tells the reader exactly where to find it.
- The in-text citation is brief: author and year, sometimes with a page number.
- The reference list gives the complete details, ordered alphabetically by author surname.
Every in-text citation should match an entry in the reference list, and every entry in the list should be cited at least once in the text.
In-text citations
The basic in-text citation is the author’s surname and the year of publication in brackets:
Climate models have improved steadily since the 1990s (Smith, 2020).
If the author’s name already appears in your sentence, you only need the year:
Smith (2020) argues that climate models have improved steadily.
For a direct quotation, add the page number so the reader can find the exact words. Write it as p. for one page or pp. for a range:
The author calls this “a turning point for the field” (Smith, 2020, p. 15).
Two authors, and three or more
The number of authors changes how you write the citation.
- Two authors: name both and join them with an ampersand inside the brackets, for example (Smith & Jones, 2020). If the names run in your sentence, use “and” instead: Smith and Jones (2020) found that…
- Three or more authors: name only the first author, followed by et al. (Latin for “and others”), as in (Smith et al., 2020).
In the reference list, most Harvard variants spell out all the authors in full rather than using et al., so check your guide for how many names to include.
Reference list: how to cite a book
A book entry in Harvard usually follows this order:
Author, Initial. (Year) Title. City: Publisher.
The title is in italics, the year sits in brackets, and the place of publication comes before the publisher. A worked example:
Smith, J. (2020) Understanding Climate Models. London: Academic Press.
For two authors, list both and join them with an ampersand:
Smith, J. & Jones, A. (2020) Understanding Climate Models. London: Academic Press.
Reference list: how to cite a website
A web page needs the date you read it, because online content can change. The common Harvard format is:
Author/Organisation (Year) Title of page. Available at: URL (Accessed: date).
A worked example:
Met Office (2023) How weather forecasts are made. Available at: https://www.metoffice.gov.uk/about-us/how-forecasts-are-made (Accessed: 14 June 2026).
If there is no individual author, use the organisation that published the page. If there is no obvious date, you can write (no date) in place of the year. Keeping the access date accurate matters most for pages that update or that have no fixed publication date.
Building the references quickly
Once you know the pattern, the format is repetitive, which is exactly the kind of work a tool handles well. Paste a title, an author or a URL into the Harvard citation builder and it lays out the reference in the right order, with the italics and punctuation in place. You still cite the author and year in your text by hand, but the reference list comes out formatted.
Two reminders before you submit. First, check your in-text citations against the reference list so nothing is missing from either side. Second, confirm the exact style your course expects, since Harvard variants differ on small points. When that is settled, open the citation generator and work through your sources one at a time.
If you are weighing Harvard against other styles, see APA vs MLA vs Chicago, or read how to cite a website in APA for the author-date approach in a related style.