A Painting, Sculpture, or Photograph (original work)
Include the artist's name. Give the title of the artwork in italics. Provide the date of composition. If the date of composition is unknown, place the abbreviation n.d. in place of the date. Finally, provide the name of the institution that houses the artwork followed by the location of the institution.
Goya, Francisco. The Family of Charles IV. 1800. Museo del Prado, Madrid.
A Painting, Sculpture, or Photograph (reprinted in a book)
For photographic reproductions of artwork (e.g. images of artwork in a book), cite the bibliographic information as above followed by the information for the source in which the photograph appears, including page or reference numbers (plate, figure, etc.).
Goya, Francisco. The Family of Charles IV. 1800. Museo del Prado, Madrid. Gardener's Art Through the Ages. 10th ed. By Richard G. Tansey and Fred S. Kleiner. Fort Worth: Harcourt Brace. 939. Print.
A Painting, Sculpture, or Photograph (reprinted in a book, but without documentation)
If complete documentation is not provided on either the page where the photograph appears, or in the book’s bibliography, give whatever information is available and cite the photograph as follows: Photographer’s name (if available). “Caption or description of the photograph.” Date of the photograph (if available). Title of the book. By Author(s) (first name first). City of publication: Publisher. Page number on which the photograph appears.
“Russian famine victim, 1922. In some parts of the country, starvation forced people into cannibalism.” n.d. Causes and Consequences of World War I. By Stewart Ross. Austin, Texas: Raintree Steck-Vaughn. 57.

An Electronic Image (Including a Painting, Sculpture, or Photograph)

Provide the artist's name, the work of art italicized, the date of creation, the institution and city where the work is housed. Follow this initial entry with the name of the Website in italics, the medium of publication, and the date of access.
Goya, Francisco. The Family of Charles IV. 1800. Museo Nacional del Prado, Madrid. Museo National del Prado. Web. 22 May 2006.
If the work is cited on the web only, then provide the name of the artist, the title of the work, the medium of the work, and then follow the citation format for a website.
Photographer’s name (if available). “Civilians join German soldiers on their first mile’s march toward Paris.” Date of the photograph (if available, otherwise n.d.). Photograph. Hanlon, Mike. Trenches on the Web. The Great War Society. 03 June 2004. Web. 10 Dec. 2010.

The above examples were modified from The Purdue OWL. Purdue U Writing Lab, 2010. Web. Dec. 10, 2010.