Choosing & Narrowing Your Topic
Reference works, such as encyclopedias, are excellent sources of background information and indispensable for curious researchers. They are ideal for finding a topic and honing in on a research question.
However, reference sources are not considered scholarly sources. Therefore, you should not be including any reference sources in your final bibliography.
Instead, use reference sources as they are intended to give you a foundation of information on any topic that you would like to learn more about.