Cite

[No. 47: Photograph of three men butchering an animal, mountains in background]

MLA

[No. 47: Photograph of Three Men Butchering an Animal, Mountains in Background]. 1915. https://collections.library.yale.edu/catalog/11679639.

APA, 6th edition

[No. 47: Photograph of three men butchering an animal, mountains in background]. (1915). [Photographs, Slides (glass)]. https://collections.library.yale.edu/catalog/11679639.