MLA

Simpson, Randolph Linsly, 1927-1992. Unknown photographer Oval portrait of young girl wearing gingham dress and gold tinted jewelry. Ninth plate, Ambrotype. Box 3, folder 41. circa 1860. https://collections.library.yale.edu/catalog/2002061.

APA, 6th edition

Simpson, Randolph Linsly, 1927-1992. (["Box 3, folder 41"])(circa 1860)[Unknown photographer Oval portrait of young girl wearing gingham dress and gold tinted jewelry. Ninth plate, Ambrotype]. https://collections.library.yale.edu/catalog/2002061.