There are many different citation styles and choosing one can be difficult. Instructors often specify which style they want their students to use, but sometimes the choice is left to the student. Below is a list of commonly used citation styles and the disciplines with which they are associated. Regardless of which style is used it is most important that that the same style is used consistently throughout the paper or manuscript.
The APA style is the American Psychological Association style format used in psychology
The Chicago Manual of Style is used by some social sciences and humanities scholars and is nearly identical to Turabian style
MLA style is the Modern Language Association style most often used in English studies. More information can be found in the MLA Handbook for Writers of Research Papers
ACM style used by the Association of Computing Machinery
Guides to Citation Styles
There are many Websites that offer summaries of the various styles, as well as suggestions for citing electronic resources.