ProQuest is actually a vendor (company) that provides several different databases. If your instructor wants you to use the ProQuest databases in particular, the easiest way to limit yourself to these databases is:
1. Go to library homepage: http://www.mssu.edu/library/
2. Click on the A-Z Database List link
3. Scroll down to ProQuest Central
Or to access peer-reviewed articles from all of the databases the library subscribes to:
1. Go to library homepage: http://www.mssu.edu/library/
2. Enter your search terms in the Summon search box
3. On left-hand side of results page, check boxes next to:
Scholarly & Peer-Review
Journal Article