Harvard style, the full name of Harvard reference system, is a reference format that originated in American academic circles in the 1950s. Compared with other common citation formats, Harvard format adopts "author-date method", which is similar to APA format.

First of all, the Harvard style reference is divided into two parts:

Citation in the text: This is to use the original text of your work immediately after using the quotation, wording or abstract.

Bibliography: A complete list of all the cited bibliographies used in your article, including complete bibliographic details. In this way, readers can trace these bibliographies and find the original text.

Extended data:

If the source is cited in the article, the method is to provide the author's name, followed by the date of publication. Detailed references, bibliography, publication information, etc. Will be placed in the last reference list.

1) If the reference is a complete information source, or an idea or theme that runs through the whole work, or an important part of the information source, then you only need to enter the author and date, for example: (Smith 20 17) or Smith(20 17).

2) References that use direct quotation marks or cite specific parts of the source should include the page number in your citation, for example: (Smith 20 17, page 42) or Smith(20 17, page 42).

3) If the author's name appears in the text as part of the text, the year will be enclosed in brackets, for example, according to Smith(20 17).

4) If the author's name does not appear in the text, the name and date should be put in square brackets, for example, the term has been questioned when it was discovered ... (Smith 20 17).