Harvard referencing, also known as the author-date system, was developed at Harvard University in the 1950s and 1960s and is now used by publishers and academics all over the world. Under this system, a source is cited in the text in parentheses immediately after the passage that is based on it, using the last name of the author and the year of publication only, as in (Author 2005). Other refinements are added for a special situation, such as multiple authors or an author with multiple publications in one year.
NOTE: The Harvard system of referencing is not tightly specified, and some variation in the use of capital letters, italics, the use of parentheses and text styles does occur in different institutions and journals. Please check the 'house style' that is specified for your publication, thesis, dissertation or assignment before submitting your work.
The above text was used with permission from the University of North Texas Libraries' Harvard Reference System guide.