Check with your professor to find out which citation style is preferred for your research. The most commonly-used style is APA.
When citing your research:
Some databases can generate citations for users after they select a preferred citation style. If you are using one of these databases, be aware that they do not always produce correctly formatted citations. You will have to double-check the citations to make sure they are formatted properly.
These sites generate citations based on information users provide about their sources. Citations generated automatically may not be perfectly formatted, so remember to check your work.
Purdue's Online Writing Lab provides a guide to using the APA, MLA, and Chicago citation styles. It includes examples of citations as well as sample papers.
Publication Manual of the American Psychological Association, 6th ed.
Reference BF76.7 .P83 2010
Official manual for the APA citation style