Sources not directly cited but used as prior reading
Quick Guide to Evaluating Sources
Videos
Script is a derivative of "Evaluating Sources for Credibility" by Lisa Becksford, NCSU Library, used under a Creative Commons Attribution-NonCommercial-ShareAlike 3.0
A great guide from NCSU Libraries explaining the differences between popular, scholarly, and trade publications. Very helpful for those confused about what makes a resource scholarly.
A guide from UC Sandiego Libraries on the differences between primary, secondary, and tertiary sources. Remember, that a source can be more than one type, depending on context.