MLA

Mt. Pleasant, Benedict Arnold's Mansion, Philadelphia. No. 51367. Detroit Photographic Co. or Detroit Publishing Co, 0AD. https://collections.library.yale.edu/catalog/2006805.

APA, 6th edition

Mt. Pleasant, Benedict Arnold's Mansion, Philadelphia. no. 51367. (0 C.E.). [Photograph albums, Photographic prints, Photographs, Photolithography, Photomechanical prints]. Detroit Photographic Co. or Detroit Publishing Co. https://collections.library.yale.edu/catalog/2006805.