MLA

Van Vechten, Carl, 1880-1964. Duchamp, Marcel. Box 474 | Folder 8062. 1933 November 17. https://collections.library.yale.edu/catalog/2021576.

APA, 6th edition

Van Vechten, Carl, 1880-1964. (["Box 474 | Folder 8062"])(1933 November 17)[Duchamp, Marcel]. https://collections.library.yale.edu/catalog/2021576.