MLA

Dellenbaugh, Frederick Samuel, 1853-1935. Utah. Box 1, folder 1. n.d.. https://collections.library.yale.edu/catalog/2015525.

APA, 6th edition

Dellenbaugh, Frederick Samuel, 1853-1935. (["Box 1, folder 1"])(n.d.)[Utah]. https://collections.library.yale.edu/catalog/2015525.