In academic papers, you are expected to acknowledge the sources of your information and ideas, by 'citing' them. This is not only a matter of honesty and courtesy, but to allow your readers to expand their knowledge by looking at your sources.
Different disciplines follow different rules for how to cite, and how to format papers - these are outlined in 'style guides' or 'style manuals.' Education, and many Social Science disciplines, use the Publication Manual of the American Psychological Association, now in its 6th edition.
APA style Guide to Electronic Resources - While the library doesn't have electronic access to the entire APA Publications Manual, it does to this guide to electronic resources - which often is what you're needing.
Getting Started with APA Citation Style - Lots of examples of citing different kinds of materials, from UBC Library
Purdue University's Online Writing Lab (OWL) - APA Formatting and Style Guide - Click on the left-hand menu to find examples of how to cite many different formats of materials, both within your paper and in your reference list.