Reference works are an excellent place to begin researching a topic. They provide explanations of terms and concepts and offer background information. They also typically include bibliographies, which can lead to other pertinent articles and books on a topic.
A searchable collection of ebooks, most of which are encyclopedias and other reference materials. Great for background information on a topic.
This online encyclopedia can give a student some general background material, but for this assignment do not include it as one of your sources.