MLA

Red Rock Falls, Paradise Creek, Pocono Mountains, Pa. No. 51278. Detroit Photographic Co. or Detroit Publishing Co, 0AD. https://collections.library.yale.edu/catalog/2006802.

APA, 6th edition

Red Rock Falls, Paradise Creek, Pocono Mountains, Pa. no. 51278. (0 C.E.). [Photograph albums, Photographic prints, Photographs, Photolithography, Photomechanical prints]. Detroit Photographic Co. or Detroit Publishing Co. https://collections.library.yale.edu/catalog/2006802.