Selection of high-quality, expert-authored/sponsored information sources lend authority to your paper. (And, hopefully, will increase your grade!)
In addition to the resources your professor has given you for this assignment, we have many databases (under "Where to find sources") that often is behind paywalls if you only search through Google.
If you have any questions, you can always contact Frankie or I through our email links on the left side of this page, or through Canvas. We are here to help!