Reference books, like encyclopedias and handbooks, are great sources of background information about cultures and time periods. They summarize information found in scholarly sources, and you can cite them directly, but also check out their mini-bibliographies for each entry- some of the sources they cite may be more specific and very helpful for your research topic, and you can search for them in the library catalog.
Here are a few encyclopedia and handbook sources that may be helpful for this assignment! Can't find what you need? Try searching the library's Online Reference Collection, or Ask a librarian for help!