MLA

Ajo, Arizona 1917-1918. 1917. https://collections.library.yale.edu/catalog/33313203.

APA, 6th edition

Ajo, Arizona 1917-1918. (1917). [Pictorial works, Gelatin silver prints, Photograph albums, Photographic prints, Photographs]. https://collections.library.yale.edu/catalog/33313203.