EasyBib helps you create citations for images
Citing a photograph displayed in a museum or institution
From the EasyBib website
Last, First M. Photograph Title. Year Created. Photograph. Museum/Institution, Location.
Museum/collection: Where the photo is taken
City: City where the photo is located
Cartier-Bresson, Henri. Juvisy, France. 1938. Photograph. The Museum of Modern Art, New York City.