MLA

Simpson, Randolph Linsly, 1927-1992. Unknown photographer Group portrait, family of five, Cased tintype, half plate. Box 6, folder 75. circa 1875. https://collections.library.yale.edu/catalog/2002132.

APA, 6th edition

Simpson, Randolph Linsly, 1927-1992. (["Box 6, folder 75"])(circa 1875)[Unknown photographer Group portrait, family of five, Cased tintype, half plate]. https://collections.library.yale.edu/catalog/2002132.