Photograph
Chicago Manual 14.235
See examples below:
Notes-Bibliography Style
1st Footnote or Endnote
12. Eric Buchholz, Untitled, 1920, gouache on paper, Museum of Modern
Art, New York, http://www.moma.org/collection/browse_results.php?object_id
=38187.
Bibliography
Usually not cited in bibliography.
Author-Date Style
1st Parenthetical Note
(Buchholz 1920)
Reference List
Buchholz, Eric. 1920. Untitled, 1920. Gouache on paper. Museum of Modern
Art. New York, http://www.moma.org/collection/browse_results.php?object_id
=38187.