Cite

[Photograph of unnamed companion smoking a pipe and repairing hiking boots in the woods]. 4

MLA

[Photograph of Unnamed Companion Smoking a Pipe and Repairing Hiking Boots in the Woods]. 4. 0AD. https://collections.library.yale.edu/catalog/2015132.

APA, 6th edition

[Photograph of unnamed companion smoking a pipe and repairing hiking boots in the woods]. 4. (0 C.E.). [Photographic prints, Photographs, Stereographs]. https://collections.library.yale.edu/catalog/2015132.