The in-text citation for an image uses the "Creator, Year" format or, if no date is available, "Creator, n.d." For example:
Starry Night (van Gogh, 1889) is a masterpiece depicting the night sky over southern France.
Alternatively, you can include the creator's name in a signal phrase instead of in the parenthetical citation. For example:
One masterful example of a painting is van Gogh's Starry Night (1889), depicting the night sky over southern France.
The basic format for the reference listing includes the creator, his role, the year of publication, the title of the image, the type of image and the URL. The basic format is as follows:
Creator. (Role). (Year). Title (in italics) [Media]. Retrieved from URL
van Gogh, Vincent. (Artist). (1889). Starry Night (in italics) [Painting]. Retrieved from http://www.vangoghgallery.com/catalog/Painting/508/Starry-Night.html