MLA

Stettheimer, Florine, 1871-1944. Diary. Box 7, folder 121-22. 1940. https://collections.library.yale.edu/catalog/17054797.

APA, 6th edition

Stettheimer, Florine, 1871-1944. (["Box 7, folder 121-22"])(1940)[Diary]. https://collections.library.yale.edu/catalog/17054797.