MLA

Simpson, Randolph Linsly, 1927-1992. C.F. Lecocq, Photographic Artist, 5 Chatham Square, New York Three quarter length portrait, young man seated in chair with three piece suit, left elbow rests on table. Carte de visite. Box 11, folder 391. circa 1885. https://collections.library.yale.edu/catalog/2003983.

APA, 6th edition

Simpson, Randolph Linsly, 1927-1992. (["Box 11, folder 391"])(circa 1885)[C.F. Lecocq, Photographic Artist, 5 Chatham Square, New York Three quarter length portrait, young man seated in chair with three piece suit, left elbow rests on table. Carte de visite]. https://collections.library.yale.edu/catalog/2003983.