APA (American Psychological Association) style is most commonly used in the social sciences.
The style uses in-text citations in the author-date style. For example, (Jones 1998) or if you are using a direct quote (Jones, 1998, p. 199).
Reference List example of a citation from a journal article:
Harlow, H. F. (1983). Fundamentals for preparing psychology journal articles. Journal of Comparative and Physiological Psychology, 55, 893-896.
There are two parts to every citation:
Example in APA: