Clarification: Please do not use unprofessional sources such as Wikipedia, About.com, Answers.com, Dictionary.com, How.com, or anything remotely similar.  Examples of scholarly sources include textbooks, articles, academic journals, and conference proceedings. Scholarly resources are written by experts in their fields, grounded in research, and often refereed (reviewed and edited by researchers in the field). Examples of professional sources include trade journals or magazines. Professional sources are written for a specific audience that works in a certain field. They are not research-based. You can also use our course content (e.g. Read & Watch resources) as a source as well. UMGC has a top-notch, extensive online library. You can find many scholarly and professional sources there.