Cite

Close up Longs Peak taken almost two miles high just below ""timberline""

MLA

Scharff, Seward. Close up Longs Peak Taken Almost Two Miles High Just below ""Timberline"". 1925. https://collections.library.yale.edu/catalog/2018327.

APA, 6th edition

Scharff, S. (1925). Close up Longs Peak taken almost two miles high just below ""timberline"" [Photographic prints, Photographs]. https://collections.library.yale.edu/catalog/2018327.