When you use the words, ideas, or creations of someone else, cite them. To make it easier to keep track of your sources, try a citation tool like Zotero. Not sure how to properly format your citations? Citation styles (MLA, APA, Chicago) give you detailed guidelines. The citation style you use will depend on the discipline, journal, or course for which you are writing.
While each professor may have a different preference for what information you will need for an image citation, you can use this as a guide.
If you do not know any of these items, provide what you do know and put “unknown” for the rest.
Sometimes, it is sufficient to give just a credit line below the image, rather than a full footnote or endnote. Generally, Turabian style does not require a bibliographic citation for an image.
Try these helpful guides from other schools:
John Everett Millais. Ophelia, 1852. Oil on canvas. Tate Britain, London.
762 x 1118 mm. ARTstor.