Cite

[Photograph of rock formations in southern Utah]

MLA

Dellenbaugh, Frederick Samuel, 1853-1935. [Photograph of rock formations in southern Utah]. Box 2 | Folder 43. undated. https://collections.library.yale.edu/catalog/2017825.

APA, 6th edition

Dellenbaugh, Frederick Samuel, 1853-1935. (["Box 2 | Folder 43"])(undated)[[Photograph of rock formations in southern Utah]]. https://collections.library.yale.edu/catalog/2017825.