MLA

Van Vechten, Carl, 1880-1964. Watkins, Linda. Box 382 | Folder 5686. 1934 December 18. https://collections.library.yale.edu/catalog/10629903.

APA, 6th edition

Van Vechten, Carl, 1880-1964. (["Box 382 | Folder 5686"])(1934 December 18)[Watkins, Linda]. https://collections.library.yale.edu/catalog/10629903.