MLA

Van Vechten, Carl, 1880-1964. Dilworth, Hubert. Box 89 | Folder 1538. 1963 August 28. https://collections.library.yale.edu/catalog/2022114.

APA, 6th edition

Van Vechten, Carl, 1880-1964. (["Box 89 | Folder 1538"])(1963 August 28)[Dilworth, Hubert]. https://collections.library.yale.edu/catalog/2022114.