It is very important to correctly attribute information you present in an academic paper, project or presentation. In some cases your instructor will require certain citation formats. The sites below will guide you through the different formats.

http://www.wisc.edu/Writing/Handbook/Documentation.html

http://www.support.epnet.com/uploads/kb/citation_help.pdf

http://www.dianahacker.com/resdoc/

For APA - http://owl.english.purdue.edu/owl/resource/560/01/

For MLA - http://owl.english.purdue.edu/owl/resource/747/01/