MLA

Simpson, Randolph Linsly, 1927-1992. Unknown photographer Full length portrait of man standing in military cadet uniform; holds sword at the port. Photographic postcard. Box 25. circa 1918. https://collections.library.yale.edu/catalog/16172740.

APA, 6th edition

Simpson, Randolph Linsly, 1927-1992. (["Box 25"])(circa 1918)[Unknown photographer Full length portrait of man standing in military cadet uniform; holds sword at the port. Photographic postcard]. https://collections.library.yale.edu/catalog/16172740.