MLA

Simpson, Randolph Linsly, 1927-1992. Studio unknown Full length portrait of white man wearing felt hat and coat with velvet collar, blanket around legs, seated in wicker boardwalk wheeled chair; black attendant standing beside. Tintype, paper cased, half plate. Box 8, folder 149. circa 1895. https://collections.library.yale.edu/catalog/2002193.

APA, 6th edition

Simpson, Randolph Linsly, 1927-1992. (["Box 8, folder 149"])(circa 1895)[Studio unknown Full length portrait of white man wearing felt hat and coat with velvet collar, blanket around legs, seated in wicker boardwalk wheeled chair; black attendant standing beside. Tintype, paper cased, half plate]. https://collections.library.yale.edu/catalog/2002193.