Cite

In the midst of a Grand Canyon rapid

MLA

Dellenbaugh, Frederick Samuel, 1853-1935. In the midst of a Grand Canyon rapid. Box 1 | Folder 29. undated. https://collections.library.yale.edu/catalog/2017651.

APA, 6th edition

Dellenbaugh, Frederick Samuel, 1853-1935. (["Box 1 | Folder 29"])(undated)[In the midst of a Grand Canyon rapid]. https://collections.library.yale.edu/catalog/2017651.