MLA

Dellenbaugh, Frederick Samuel, 1853-1935. Arizona. Box 4, folder 129. 1903, n.d.. https://collections.library.yale.edu/catalog/2025127.

APA, 6th edition

Dellenbaugh, Frederick Samuel, 1853-1935. (["Box 4, folder 129"])(1903, n.d.)[Arizona]. https://collections.library.yale.edu/catalog/2025127.