Cite

U.S. Army scouts along the Rio Grande

MLA

U.S. Army Scouts along the Rio Grande. 0AD. https://collections.library.yale.edu/catalog/2017299.

APA, 6th edition

U.S. Army scouts along the Rio Grande. (0 C.E.). [Photographic postcards, Photographic prints, Photographs]. https://collections.library.yale.edu/catalog/2017299.