MLA

Simpson, Randolph Linsly, 1927-1992. The Royal Studio, Boston Cameo portrait, girl with elaborate bowed collar. Cabinet photograph. Box 9, folder 203. 1891 August 17. https://collections.library.yale.edu/catalog/2002255.

APA, 6th edition

Simpson, Randolph Linsly, 1927-1992. (["Box 9, folder 203"])(1891 August 17)[The Royal Studio, Boston Cameo portrait, girl with elaborate bowed collar. Cabinet photograph]. https://collections.library.yale.edu/catalog/2002255.