The Harvard referencing style is another popular style using the author-date system for in-text citations. Harvard referencing is the preferred style for English / Humanities / business subjects.
There are two parts to Harvard style referencing:
It consists mainly of the authors' last name and the year of publication (and page numbers if it is directly quoted) in round brackets placed within the text. If there is no discernable author, the title and date are used.
The reference list should be ordered alphabetically by the last name of the first author of each work. References with no author are ordered alphabetically by the first significant word of the title.