MLA

West, Rebecca, 1892-1983. Morris, John. Box 2, folder 76-79. 1943-74, n.d.. https://collections.library.yale.edu/catalog/16495493.

APA, 6th edition

West, Rebecca, 1892-1983. (["Box 2, folder 76-79"])(1943-74, n.d.)[Morris, John]. https://collections.library.yale.edu/catalog/16495493.