Upsilon Peak, Estes Park, Colorado, no. 51012
MLA
Upsilon Peak, Estes Park, Colorado, No. 51012. Detroit Photographic Co. or Detroit Publishing Co, 0AD. https://collections.library.yale.edu/catalog/2005818.
APA, 6th edition
Upsilon Peak, Estes Park, Colorado, no. 51012. (0 C.E.). [Photographic prints, Photographs]. Detroit Photographic Co. or Detroit Publishing Co. https://collections.library.yale.edu/catalog/2005818.