MLA

Van Vechten, Carl, 1880-1964. Watkins, Linda. Box 385 | Folder 5803. 1938 May 29. https://collections.library.yale.edu/catalog/10629995.

APA, 6th edition

Van Vechten, Carl, 1880-1964. (["Box 385 | Folder 5803"])(1938 May 29)[Watkins, Linda]. https://collections.library.yale.edu/catalog/10629995.