Cite

Grand Canyon

MLA

Dellenbaugh, Frederick Samuel, 1853-1935. Grand Canyon. Box 1, folder 9. n.d.. https://collections.library.yale.edu/catalog/2017548.

APA, 6th edition

Dellenbaugh, Frederick Samuel, 1853-1935. (["Box 1, folder 9"])(n.d.)[Grand Canyon]. https://collections.library.yale.edu/catalog/2017548.