Cite

[Photograph of one unidentified buffalo soldier near a helmet]

MLA

[Photograph of One Unidentified Buffalo Soldier near a Helmet]. 0AD. https://collections.library.yale.edu/catalog/2009695.

APA, 6th edition

[Photograph of one unidentified buffalo soldier near a helmet]. (0 C.E.). [Cartes-de-visite, Photographic prints, Photographs, Studio portraits]. https://collections.library.yale.edu/catalog/2009695.