MLA

Van Vechten, Carl, 1880-1964. Barthé, Richmond. Box 84, folder 1390. 1947 June 13. https://collections.library.yale.edu/catalog/2020648.

APA, 6th edition

Van Vechten, Carl, 1880-1964. (["Box 84, folder 1390"])(1947 June 13)[Barthé, Richmond]. https://collections.library.yale.edu/catalog/2020648.