MLA

Delaware Water Gap. No. 53473. Detroit Photographic Co. or Detroit Publishing Co, 0AD. https://collections.library.yale.edu/catalog/2006807.

APA, 6th edition

Delaware Water Gap. no. 53473. (0 C.E.). [Landscapes (Representations), Photograph albums, Photographic prints, Photographs, Photolithography, Photomechanical prints]. Detroit Photographic Co. or Detroit Publishing Co. https://collections.library.yale.edu/catalog/2006807.