MLA

Dellenbaugh, Frederick Samuel, 1853-1935. Havasu Canyon. Box 4, folder 143. n.d.. https://collections.library.yale.edu/catalog/2025297.

APA, 6th edition

Dellenbaugh, Frederick Samuel, 1853-1935. (["Box 4, folder 143"])(n.d.)[Havasu Canyon]. https://collections.library.yale.edu/catalog/2025297.