While going directly to the style guide is the best way to ensure accuracy in your citations, here are some online sources to serve as a quick examples for the basics.
American Sociological Association - quick tips for ASA style as a pdf
ProQuest RefWorks is a tool that helps you handle all your citations. It's particularly useful for this assignment because not only does it manage your citations for a bibliography, but you can share a folder with the rest of your group. The link below takes you through all of the basics of how to utilize RefWorks.
More specifically, RefWorks allows you to:
If you'd like to see how to edit a RefWorks citation or upload a document to annotate in RefWorks to share with your group, you can watch this video.
If you are using a lot of web sources, rather than pulling from a database, you may also want to use the browser plugin "Save to RefWorks" to generate citations from the web. You can find it under the Tools option in RefWorks.