MLA

Ford, Charles Henri, 1908-2002. Genet, Jean. Box 1, folder 69. 1945-46, n.d.. https://collections.library.yale.edu/catalog/17124851.

APA, 6th edition

Ford, Charles Henri, 1908-2002. (["Box 1, folder 69"])(1945-46, n.d.)[Genet, Jean]. https://collections.library.yale.edu/catalog/17124851.