MLA

Dellenbaugh, Frederick Samuel, 1853-1935. Grand Canyon. Box 3, folder 118. 1925. https://collections.library.yale.edu/catalog/2018328.

APA, 6th edition

Dellenbaugh, Frederick Samuel, 1853-1935. (["Box 3, folder 118"])(1925)[Grand Canyon]. https://collections.library.yale.edu/catalog/2018328.