Whenever you quote, paraphrase, summarize, or otherwise refer to the work of another, you are required to cite its source. These resources will help you properly cite sources for research papers.
A Research Guide for Students
http://www.aresearchguide.com/A+ Research and Writinghttp://www.ipl.org/div/aplus/Thesis Builderhttp://www.tommarch.com/electraguide/