Cite

[Photograph of 15th Cavalry in Military Parade]

MLA

[Photograph of 15th Cavalry in Military Parade]. 1915. https://collections.library.yale.edu/catalog/2017314.

APA, 6th edition

[Photograph of 15th Cavalry in Military Parade]. (1915). [Photographic postcards, Photographic prints, Photographs]. https://collections.library.yale.edu/catalog/2017314.