Cite

[Photograph of Mexican battle scene]

MLA

Trenkle, Ernest J. [Photograph of Mexican Battle Scene]. 0AD. https://collections.library.yale.edu/catalog/2017180.

APA, 6th edition

Trenkle, E. J. (0 C.E.). [Photograph of Mexican battle scene] [Photographic postcards, Photographic prints, Photographs]. https://collections.library.yale.edu/catalog/2017180.