Cite

[Photograph of one unidentified buffalo soldier]

MLA

[Photograph of One Unidentified Buffalo Soldier]. 0AD. https://collections.library.yale.edu/catalog/2009692.

APA, 6th edition

[Photograph of one unidentified buffalo soldier]. (0 C.E.). [Cartes-de-visite, Photographic prints, Photographs, Studio portraits]. https://collections.library.yale.edu/catalog/2009692.