MLA

Van Vechten, Carl, 1880-1964. Hopper, Hedda. Box 353, folder 4759. 1934 October 18. https://collections.library.yale.edu/catalog/33247097.

APA, 6th edition

Van Vechten, Carl, 1880-1964. (["Box 353, folder 4759"])(1934 October 18)[Hopper, Hedda]. https://collections.library.yale.edu/catalog/33247097.