Cite

El Capitan as seen from the floor of Yosemite Valley. A31

MLA

El Capitan as Seen from the Floor of Yosemite Valley. A31. 0AD. https://collections.library.yale.edu/catalog/2017111.

APA, 6th edition

El Capitan as seen from the floor of Yosemite Valley. A31. (0 C.E.). [Lantern slides, Photographic prints, Photographs]. https://collections.library.yale.edu/catalog/2017111.