MLA

Van Vechten, Carl, 1880-1964. Caldwell, Erskine. Box 339 | Folder 4331. 1934 October 1. https://collections.library.yale.edu/catalog/2031462.

APA, 6th edition

Van Vechten, Carl, 1880-1964. (["Box 339 | Folder 4331"])(1934 October 1)[Caldwell, Erskine]. https://collections.library.yale.edu/catalog/2031462.