Contact a Faculty Librarian if you need help evaluating whether or not a source is valid to your research.
Hacker, Diana and Barbara Fister. Research and Documentation. Bedford / St. Martin's, 2011. Web. 19 November 2012.
Quaratiello, Arlene, and Jane Devine. The College Student's Research Companion: Finding, Evaluating, and Citing the Resources You Need to Succeed. New York: Neal-Schuman, 2011.