MLA

Simpson, Randolph Linsly, 1927-1992. Lloyd, Hartford, CT Three quarter length portrait of Mrs. Mason; elderly lady seated. Cabinet photograph. Box 9, folder 190. circa 1890. https://collections.library.yale.edu/catalog/2002242.

APA, 6th edition

Simpson, Randolph Linsly, 1927-1992. (["Box 9, folder 190"])(circa 1890)[Lloyd, Hartford, CT Three quarter length portrait of Mrs. Mason; elderly lady seated. Cabinet photograph]. https://collections.library.yale.edu/catalog/2002242.