MLA

Van Vechten, Carl, 1880-1964. Luce, Claire Boothe. Box 362, folder 5006. 1933 June 14. https://collections.library.yale.edu/catalog/2056562.

APA, 6th edition

Van Vechten, Carl, 1880-1964. (["Box 362, folder 5006"])(1933 June 14)[Luce, Claire Boothe]. https://collections.library.yale.edu/catalog/2056562.