There are many more Reference books available for Political Studies, but these are some good general ones.
Reference Books are sources like encyclopedias or dictionaries that contain a large-scale overview of many subjects, often on a single topic. Reference Books are located in the Webster Reference Room on the first floor of the Library Learning Commons. Generally, they may be used in the library but are not available for loan. Use a reference source when you are unfamiliar with a topic and want a good introduction or when you want to find an authoritative opinion about a general topic.