"The Literature" refers to published scholarly works on a topic of interest. For a literature review you will want to use peer reviewed library resources. In some cases, professors will require you to only use empirical sources for a literature review. An empirical source is defined as research based on observed and measured phenomena. All empirical sources will contain a methods (or methodology) section. Always check with your professor for assignment specific requirements.
Click the link below to learn how to do effective library research.