MLA

Dellenbaugh, Frederick Samuel, 1853-1935. The Vermilion Cliffs back of Kanab. Box 1 | Folder 36. 1929. https://collections.library.yale.edu/catalog/2017721.

APA, 6th edition

Dellenbaugh, Frederick Samuel, 1853-1935. (["Box 1 | Folder 36"])(1929)[The Vermilion Cliffs back of Kanab]. https://collections.library.yale.edu/catalog/2017721.