MLA

Simpson, Randolph Linsly, 1927-1992. Unknown photographer, Large group photo of men and women in military dress (in Series I). Box 58, folder 1304. 1920. https://collections.library.yale.edu/catalog/16173711.

APA, 6th edition

Simpson, Randolph Linsly, 1927-1992. (["Box 58, folder 1304"])(1920)[Unknown photographer, Large group photo of men and women in military dress (in Series I)]. https://collections.library.yale.edu/catalog/16173711.