Cite

16th Infantry on boundary line (indicated by railroad in background) El Paso

MLA

16th Infantry on Boundary Line (Indicated by Railroad in Background) El Paso. 1914. https://collections.library.yale.edu/catalog/2017321.

APA, 6th edition

16th Infantry on boundary line (indicated by railroad in background) El Paso. (1914). [Photographic postcards, Photographic prints, Photographs]. https://collections.library.yale.edu/catalog/2017321.