MLA

Simpson, Randolph Linsly, 1927-1992. Studio unknown Half-length portrait, seated young woman with tinted gold jewelry. Tintype, sixth plate. Box 7, folder 100. circa 1880. https://collections.library.yale.edu/catalog/2002157.

APA, 6th edition

Simpson, Randolph Linsly, 1927-1992. (["Box 7, folder 100"])(circa 1880)[Studio unknown Half-length portrait, seated young woman with tinted gold jewelry. Tintype, sixth plate]. https://collections.library.yale.edu/catalog/2002157.