MLA

Van Vechten, Carl, 1880-1964. Jackman, Harold. Box 110 | Folder 2048. 1943 February 3. https://collections.library.yale.edu/catalog/2024099.

APA, 6th edition

Van Vechten, Carl, 1880-1964. (["Box 110 | Folder 2048"])(1943 February 3)[Jackman, Harold]. https://collections.library.yale.edu/catalog/2024099.