MLA

Simpson, Randolph Linsly, 1927-1992. Full length portrait, seated man in suit with derby hat. Tintype, sixth plate. Box 7, folder 110. circa 1880. https://collections.library.yale.edu/catalog/2002212.

APA, 6th edition

Simpson, Randolph Linsly, 1927-1992. (["Box 7, folder 110"])(circa 1880)[Full length portrait, seated man in suit with derby hat. Tintype, sixth plate]. https://collections.library.yale.edu/catalog/2002212.