MLA

Simpson, Randolph Linsly, 1927-1992. Tivoli Photo Studio, L.A. Group portrait of two men and two boys, with dog on stool in center. Early 20th century photograph, mounted, 6-1/2 x 8-7/8.. Box 19, folder 902. circa 1917. https://collections.library.yale.edu/catalog/16172718.

APA, 6th edition

Simpson, Randolph Linsly, 1927-1992. (["Box 19, folder 902"])(circa 1917)[Tivoli Photo Studio, L.A. Group portrait of two men and two boys, with dog on stool in center. Early 20th century photograph, mounted, 6-1/2 x 8-7/8.]. https://collections.library.yale.edu/catalog/16172718.