MLA

Dellenbaugh, Frederick Samuel, 1853-1935. The mission in Monterey .... Box 1 | Folder 27. 1921. https://collections.library.yale.edu/catalog/2017641.

APA, 6th edition

Dellenbaugh, Frederick Samuel, 1853-1935. (["Box 1 | Folder 27"])(1921)[The mission in Monterey ...]. https://collections.library.yale.edu/catalog/2017641.