MLA

Simpson, Randolph Linsly, 1927-1992. Unknown photographer, Full length formal portrait, William Frank Roach (in Series I). Box 59, folder 1314. 1918. https://collections.library.yale.edu/catalog/2032260.

APA, 6th edition

Simpson, Randolph Linsly, 1927-1992. (["Box 59, folder 1314"])(1918)[Unknown photographer, Full length formal portrait, William Frank Roach (in Series I)]. https://collections.library.yale.edu/catalog/2032260.