MLA

Van Vechten, Carl, 1880-1964. Jackman, Harold. Box 94 | Folder 1653. 1937 July 11. https://collections.library.yale.edu/catalog/2024102.

APA, 6th edition

Van Vechten, Carl, 1880-1964. (["Box 94 | Folder 1653"])(1937 July 11)[Jackman, Harold]. https://collections.library.yale.edu/catalog/2024102.