Cite

[Unidentified men and women in hiking attire]

MLA

[Unidentified Men and Women in Hiking Attire]. 0AD. https://collections.library.yale.edu/catalog/2013367.

APA, 6th edition

[Unidentified men and women in hiking attire]. (0 C.E.). [Photographic prints, Photographs]. https://collections.library.yale.edu/catalog/2013367.