Cite

[Photograph of two surveyors, one on horseback]

MLA

[Photograph of Two Surveyors, One on Horseback]. 0AD. https://collections.library.yale.edu/catalog/2014071.

APA, 6th edition

[Photograph of two surveyors, one on horseback]. (0 C.E.). [Photographic prints, Photographs, Snapshots]. https://collections.library.yale.edu/catalog/2014071.