Collins Library is a great place for you to:
Subject encyclopedias are a type of tertiary source and can make good starting points in research, especially when you are new to a topic or academic discipline. In most cases, articles from subject encyclopedias are not appropriate to use as sources in your research papers. However, subject encyclopedia entries can lead you to the scholarly secondary sources that are appropriate. Always look for the brief bibliographies or suggestions for further reading that come at the end of subject encyclopedia articles.