MLA

Simpson, Randolph Linsly, 1927-1992. W.H. Potter, Indianapolis, IN Bust length portrait of man with long moustache, looking left, shoulders draped in classical fashion. Cabinet photograph. Box 9, folder 239. 1886. https://collections.library.yale.edu/catalog/2002291.

APA, 6th edition

Simpson, Randolph Linsly, 1927-1992. (["Box 9, folder 239"])(1886)[W.H. Potter, Indianapolis, IN Bust length portrait of man with long moustache, looking left, shoulders draped in classical fashion. Cabinet photograph]. https://collections.library.yale.edu/catalog/2002291.