MLA

Ford, Charles Henri, 1908-2002. Cadmus, Paul. Box 8. 1951 October. https://collections.library.yale.edu/catalog/17124872.

APA, 6th edition

Ford, Charles Henri, 1908-2002. (["Box 8"])(1951 October)[Cadmus, Paul]. https://collections.library.yale.edu/catalog/17124872.