At El Paso in Nat'l Guard
MLA
At El Paso in Nat'l Guard. 0AD. https://collections.library.yale.edu/catalog/2017469.
APA, 6th edition
At El Paso in Nat'l Guard. (0 C.E.). [Photographic postcards, Photographic prints, Photographs]. https://collections.library.yale.edu/catalog/2017469.