MLA

Ford, Charles Henri, 1908-2002. Massey, Joe. Box 4, folder 261. n.d.. https://collections.library.yale.edu/catalog/17124867.

APA, 6th edition

Ford, Charles Henri, 1908-2002. (["Box 4, folder 261"])(n.d.)[Massey, Joe]. https://collections.library.yale.edu/catalog/17124867.