Cite

Yosemite Valley, North Dome at left, Washington's Column in center and Half Dome at right. 9

MLA

Yosemite Valley, North Dome at Left, Washington's Column in Center and Half Dome at Right. 9. 0AD. https://collections.library.yale.edu/catalog/2015147.

APA, 6th edition

Yosemite Valley, North Dome at left, Washington's Column in center and Half Dome at right. 9. (0 C.E.). [Photographic prints, Photographs, Stereographs]. https://collections.library.yale.edu/catalog/2015147.