MLA

Van Vechten, Carl, 1880-1964. Martin, Walter Elliott. Box 97, folder 1735. 1942 June 26. https://collections.library.yale.edu/catalog/2026363.

APA, 6th edition

Van Vechten, Carl, 1880-1964. (["Box 97, folder 1735"])(1942 June 26)[Martin, Walter Elliott]. https://collections.library.yale.edu/catalog/2026363.