Several universities provide excellent guides to citing images in papers and presentations. One standout:

Colgate University's Visual Resources Library (MLA, Chicago, APA)

ARTstor also provides its own guidelines.

In general, the following details are necessary for any image citation, no matter which citation style you choose:

* The title of the image, if applicable. For example, this could be the title of the artwork or, if it's a media image, the original caption.
* The name of the image's creator.
* The repository of the image. This is the institution that owns the original: the museum, the library, the archive, the individual, etc.
* The source. This could be a database such as ARTstor, a Web site, a book, etc.
* The date you accessed the image. This is most important for Web sources, which can be quite ephemeral.