MLA

Simpson, Randolph Linsly, 1927-1992. Unknown photographer Bust portrait, young girl, cap with tassel. Cased tintype, ninth plate. Box 5, folder 72. circa 1870. https://collections.library.yale.edu/catalog/2002129.

APA, 6th edition

Simpson, Randolph Linsly, 1927-1992. (["Box 5, folder 72"])(circa 1870)[Unknown photographer Bust portrait, young girl, cap with tassel. Cased tintype, ninth plate]. https://collections.library.yale.edu/catalog/2002129.