A citation is the information you need to find and cite a specific publication, usually including an article's title, author, journal title (also called source), date, volume, issue, and page numbers.
APA style is often used when writing papers in psychology, education, and other social sciences. See the Publication manual of the American Psychological Association, 6th ed. for more detailed information (BF76.7 .P83 2010).
Hornet, K. (1999). Kalamazoo's inspirational college mascots. Jivin' in the Hive, 26(3), 21-35.