MLA

Simpson, Randolph Linsly, 1927-1992. Sturtevant, 20 Madison St., Skowhegan, (ME). Cameo portrait, young woman with brooch. Cabinet photograph. Box 9, folder 161. circa 1809. https://collections.library.yale.edu/catalog/2002213.

APA, 6th edition

Simpson, Randolph Linsly, 1927-1992. (["Box 9, folder 161"])(circa 1809)[Sturtevant, 20 Madison St., Skowhegan, (ME). Cameo portrait, young woman with brooch. Cabinet photograph]. https://collections.library.yale.edu/catalog/2002213.