MLA

Simpson, Randolph Linsly, 1927-1992. Parlor Gallery, Philadelphia, PA Three quarter length portrait of man with mutton chop whiskers, in frock coat leaning on ivy pedestal. Cabinet photograph. Box 9, folder 242. 1875. https://collections.library.yale.edu/catalog/2002294.

APA, 6th edition

Simpson, Randolph Linsly, 1927-1992. (["Box 9, folder 242"])(1875)[Parlor Gallery, Philadelphia, PA Three quarter length portrait of man with mutton chop whiskers, in frock coat leaning on ivy pedestal. Cabinet photograph]. https://collections.library.yale.edu/catalog/2002294.