These general databases may also contain articles related to art.
Visual sources can be difficult to cite, so be sure to 1) include as much information as you can, 2) format the elements consistently, and 3) adapt the general formats as described in published citation style guides as needed. If you have questions, please contact me.
Citing images from an image database, such as ARTstor, should include most, if not all, of this information (or as much of it as can be easily determined from the source).