Cite

[Photograph of Indians on horseback carrying American flags]

MLA

[Photograph of Indians on Horseback Carrying American Flags]. 0AD. https://collections.library.yale.edu/catalog/2010728.

APA, 6th edition

[Photograph of Indians on horseback carrying American flags]. (0 C.E.). [Photographic prints, Photographs, Snapshots]. https://collections.library.yale.edu/catalog/2010728.