If you're being asked to cite something by an instructor in art, they're likely asking you to use either Chicago or MLA style. Hover over the "Citing Sources" tab to see pages just for these citation styles.
See the other boxes on this page for help generating citations in databases and managing citations.
Part of researching is having a strategy on how to manage all these resources/citations you've found. You can use a citation management tool like Zotero to organize citations to sources, collect digital files such as full-text PDFs, and cite sources automatically when writing papers.