There are some encyclopedias on the list to the right. While they might not count as sources for your reference list - they can be really useful for you! When you begin your research, don't be afraid to experiment and play around a bit.
The first stages of research are about getting a lay of the land. See what you can find... Association websites, news headlines, encyclopedias, and (yes!) Wikipedia - will all help you learn about ideas, names, and policies that will help you search smarter in academic sources!