In this world of information, the difficulty today is not in finding sources. The difficulty is in finding GOOD sources.
One of the primary tasks of today's scholars is evaluating the articles, books, websites, videos, etc., that are used for research. Here are some videos to help you prepare for evaluating the information you find.
Based on the C.R.A.P. Test developed by Molly Beestrum and Kenneth Orenic.
More on the C.R.A.P. Test: Crap Detection: A 21st-Century Literacy
When searching in almost any library database, check the box next to "Scholarly (Peer-Reviewed) Journals" to limit your search results.