MLA

Simpson, Randolph Linsly, 1927-1992. Unknown photographer Three men; two women stand before shanty. Photographic postcard. Box 26. circa 1927. https://collections.library.yale.edu/catalog/2042493.

APA, 6th edition

Simpson, Randolph Linsly, 1927-1992. (["Box 26"])(circa 1927)[Unknown photographer Three men; two women stand before shanty. Photographic postcard]. https://collections.library.yale.edu/catalog/2042493.