Some tips for searching "SAGE Knowledge Books and Reference" :click on the Advanced Search link and put in search terms related to your specific topic. Scroll down to "Content Types" and under the reference category, select Encyclopedias and any other relevant items.
Books and Ebooks can serve as a form of background information.
See the page of the library guide about how to search for them.
Go to the page about "Popular Articles" to find another source of background information.
A source of background information is Google
Try using the advanced Google search interface. You might want to limit your results to ".edu" types of resources, which are mainly educational. (For example, lehigh.edu )
Evaluate what you find, using the "Evaluating .Web Resources" box; see the next box.
If you use Wikipedia articles, you will have to confirm independently the information, but they can point you to useful resources. See the Wikipedia article about the Reliability of Wikipedia.
Web resources can be rich sources of information on a topic, but when conducting research, it's important to consider the quality and accuracy of sites you visit on the open web. Use the CRAPP test to determine whether a web resource is trustworthy: