MLA

Simpson, Randolph Linsly, 1927-1992. Published by E. Anthony, New York from negative of Brady's National Portrait Gallery Three quarter length formal portrait of Gerritt Smith, man seated, facing left, looking front. Carte de visite. Box 11, folder 472. circa 1870. https://collections.library.yale.edu/catalog/2004008.

APA, 6th edition

Simpson, Randolph Linsly, 1927-1992. (["Box 11, folder 472"])(circa 1870)[Published by E. Anthony, New York from negative of Brady's National Portrait Gallery Three quarter length formal portrait of Gerritt Smith, man seated, facing left, looking front. Carte de visite]. https://collections.library.yale.edu/catalog/2004008.