Looking East down the Grand Canyon from the brink of Lower Falls

Chicago citation style
Not Known. Looking East down the Grand Canyon from the brink of Lower Falls. [Date not indicated]. Retrieved from the Digital Public Library of America, http://ark.cdlib.org/ark:/13030/kt42901534. (Accessed December 10, 2018.)
APA citation style
Not Known, ([Date not indicated]) Looking East down the Grand Canyon from the brink of Lower Falls. Retrieved from the Digital Public Library of America, http://ark.cdlib.org/ark:/13030/kt42901534
MLA citation style
Not Known. Retrieved from the Digital Public Library of America <http://ark.cdlib.org/ark:/13030/kt42901534>.
Note: These citations are programmatically generated and may be incomplete.