One way to find reference material on a particular religion is to browse the Reference Collection. Some good places to start are:
290 Other & comparative religions
You may also find it helpful to browse the encyclopedias for the region in which the religion is most actively practiced:
You have access to a wide variety of titles because of the sharing agreement Northwestern has with seven other college and university libraries in the Twin Cities area. Be sure to begin your research early so that you can take advantage of this wide variety of resources. Search on Library Search for applicable books using keywords associated with your research interest.
Example searches include:
You can use ProQuest Religion to find scholarly, full-text articles on the topics of theology, religious studies, philosophy, ethics, doctrines, and religious history.