MLA

Blue Mountain from Eagle Lake, Adirondack Mountains. No. 54047. Detroit Photographic Co. or Detroit Publishing Co., 0AD. https://collections.library.yale.edu/catalog/2006651.

APA, 6th edition

Blue Mountain from Eagle Lake, Adirondack Mountains. No. 54047. (0 C.E.). [Photographic prints, Photographs]. Detroit Photographic Co. or Detroit Publishing Co. https://collections.library.yale.edu/catalog/2006651.