MLA

Simpson, Randolph Linsly, 1927-1992. Studio unknown Full length portrait, man seated with cigar in hand, prominent watch chain, Tintype, sixth plate. Box 7, folder 101. circa 1885. https://collections.library.yale.edu/catalog/2002158.

APA, 6th edition

Simpson, Randolph Linsly, 1927-1992. (["Box 7, folder 101"])(circa 1885)[Studio unknown Full length portrait, man seated with cigar in hand, prominent watch chain, Tintype, sixth plate]. https://collections.library.yale.edu/catalog/2002158.