MLA

Van Vechten, Carl, 1880-1964. Collins, Durward. Box 87, folder 1480. 1962 September 5. https://collections.library.yale.edu/catalog/2021908.

APA, 6th edition

Van Vechten, Carl, 1880-1964. (["Box 87, folder 1480"])(1962 September 5)[Collins, Durward]. https://collections.library.yale.edu/catalog/2021908.