MLA

Putnam, and Valentine. In the First Granite Gorge - Grand Canyon - Arizona. 0AD. https://collections.library.yale.edu/catalog/2018314.

APA, 6th edition

P., & V. (0 C.E.). In the first Granite Gorge - Grand Canyon - Arizona [Photographic prints, Photographs]. https://collections.library.yale.edu/catalog/2018314.