Cite

Summit of Mt. Dellenbaugh looking S.W. into Grand Canyon near plce where Howlands and Dunn left Powell in 1869

MLA

Fraser, George C. Summit of Mt. Dellenbaugh Looking S.W. into Grand Canyon near Plce Where Howlands and Dunn Left Powell in 1869. 1930. https://collections.library.yale.edu/catalog/2017910.

APA, 6th edition

Fraser, G. C. (1930). Summit of Mt. Dellenbaugh looking S.W. into Grand Canyon near plce where Howlands and Dunn left Powell in 1869 [Photographic prints, Photographs]. https://collections.library.yale.edu/catalog/2017910.