You won't cite Wikipedia in your paper, but it can still be very useful for getting your search for sources started.
This library database is a great place to find non-scholarly, but reliable resources. Look especially for:
Also, everything you find in this database will be full text.
Biographical, bibliographical and critical content for literature from all time periods and genres. Includes content from Gale's Contemporary Authors, Contemporary Literary Criticism Select, and Dictionary of Literary Biography. Cross-search multiple literary source databases in Gale Literary Sources.
This is where you go to find your 2 required scholarly sources (book chapters or journal articles).
Search tips:
1) Put the name of your author or title of work in quotation marks. This forces it to search as phrase and avoids false hits. Add other search terms outside of the quotation marks.
2) Use the Source Type menu on the left to narrow to the three scholarly source types: articles, books, and book chapters.