Sage Research Methods Collection This link opens in a new window
Helps researchers and students with their research projects. Includes more than 800 ebooks with supporting dictionary articles, journal entries, videos and cases. Also provides access to more than 150 teaching datasets taken from real research projects, to support quantitative and qualitative analytical methods.
There is an excellent help page here http://sagepub.libguides.com/research-methods/researchmethods