Cite

Summit of the Great Divide, (over two miles above level of sea)

MLA

Summit of the Great Divide, (over Two Miles above Level of Sea). 1892. https://collections.library.yale.edu/catalog/2014391.

APA, 6th edition

Summit of the Great Divide, (over two miles above level of sea). (1892). [Card photographs, Photographic prints, Photographs, Snapshots]. https://collections.library.yale.edu/catalog/2014391.