This document discusses reliable and unreliable sources for research. Reliable sources are written by experts and include books, peer-reviewed journals, and .edu and .gov websites. Unreliable sources can be altered by anyone and include Wikipedia, blogs, personal websites, and some .com websites. To determine reliability, one should check the author and look for biases, political agendas, or attempts to sell a product. Formatting sources in MLA style with author's last name, date, title, and URL is also covered.