MLA

Simpson, Randolph Linsly, 1927-1992. Disderi & Co., Paris, 8 Boulevard des Italiens; London, Brook Street 70, 71, 72 Hanover Square W. and for Equestrian Portraits, Hereford lodge, old Brompton Road, S.W. Full length portrait of Duchess of Sutherland; lady in very fancy dress, necklace and flowers in her hair. Carte de visite. Box 11, folder 409. circa 1865. https://collections.library.yale.edu/catalog/2003992.

APA, 6th edition

Simpson, Randolph Linsly, 1927-1992. (["Box 11, folder 409"])(circa 1865)[Disderi & Co., Paris, 8 Boulevard des Italiens; London, Brook Street 70, 71, 72 Hanover Square W. and for Equestrian Portraits, Hereford lodge, old Brompton Road, S.W. Full length portrait of Duchess of Sutherland; lady in very fancy dress, necklace and flowers in her hair. Carte de visite]. https://collections.library.yale.edu/catalog/2003992.