MLA

Simpson, Randolph Linsly, 1927-1992. D. Hinkle, Photographer, No. 4739 Main Street, Germantown (PA) Three quarter length double portrait, Caroline De Beilem Lovett, and Eliza; black lady in polka dot dress and bandanna, seated; white female child in white lace dress with sash seated in her lap. Carte de visite. Box 11, folder 334. circa 1870. https://collections.library.yale.edu/catalog/2003850.

APA, 6th edition

Simpson, Randolph Linsly, 1927-1992. (["Box 11, folder 334"])(circa 1870)[D. Hinkle, Photographer, No. 4739 Main Street, Germantown (PA) Three quarter length double portrait, Caroline De Beilem Lovett, and Eliza; black lady in polka dot dress and bandanna, seated; white female child in white lace dress with sash seated in her lap. Carte de visite]. https://collections.library.yale.edu/catalog/2003850.