Creating a bibliography (your professor might refer to it as a reference list or a works cited list) is easy in Zotero. This is the complete list of all the sources you're using in a particular paper or project, and typically is put at the end of an essay.
Zotero has access to thousands of citation styles, but as a student you'll only have to worry about a few. To make sure the ones you'll use are the most easily accessible: