Research typically involves using a variety of sources:
Articles (newspapers, magazines, journals, found in library databases)
Proceedings or Papers
The video to the immediate right provides an overview of the type of information you can find in sources such as books, encyclopedias, journal and magazine articles.
Your professor may also ask for primary or secondary sources (or both). The tutorial immediately to the right will help you to distinguish between the two.
"If we knew what it was we were doing, it would not be called research, would it?"
--Albert Einstein
Image source: Public domain. Wikimedia Commons.