MLA

Simpson, Randolph Linsly, 1927-1992. Unmarked, [probably Galleria Fotographica, Havana as D-137] Brace of three matching horses harnessed to two-wheeled carriage, facing left, black postilion in tropical livery, white man in suit, white pants, and hat sits in carriage. Carte de visite. Box 11, folder 451. circa 1870. https://collections.library.yale.edu/catalog/2004004.

APA, 6th edition

Simpson, Randolph Linsly, 1927-1992. (["Box 11, folder 451"])(circa 1870)[Unmarked, [probably Galleria Fotographica, Havana as D-137] Brace of three matching horses harnessed to two-wheeled carriage, facing left, black postilion in tropical livery, white man in suit, white pants, and hat sits in carriage. Carte de visite]. https://collections.library.yale.edu/catalog/2004004.