Most of the library databases have built-in citation generators. When you're looking at an item in a database, click the "Cite" or "Citation" button to generate a citation in the style of your choice.
Quest has a built-in citation generator, too. Here's what it looks like:
Some citation generators do more than just generate citations -- they also help you store and organize the sources that you find. One such tool is Zotero. Zotero is free, and highly recommended by UMW librarians. Click here for the UMW Libraries guide to Zotero.
Caution: If you use Zotero or another citation generator, be sure to check the citations for errors. Citation generators work using the data that you give them; if any of the inputted data is incorrect (e.g. in spelling or capitalization or punctuation), the citation will also be incorrect. Before you submit your citations to your professor, look at each citation and make sure that it matches the example citations provided by UMW.