MLA

Dellenbaugh, Frederick Samuel, 1853-1935. Grand Canyon. Box 4, folder 123. 1909. https://collections.library.yale.edu/catalog/2024004.

APA, 6th edition

Dellenbaugh, Frederick Samuel, 1853-1935. (["Box 4, folder 123"])(1909)[Grand Canyon]. https://collections.library.yale.edu/catalog/2024004.