MLA

Van Vechten, Carl, 1880-1964. Bryher. Box 338 | Folder 4312. 1938 December 21. https://collections.library.yale.edu/catalog/2031355.

APA, 6th edition

Van Vechten, Carl, 1880-1964. (["Box 338 | Folder 4312"])(1938 December 21)[Bryher]. https://collections.library.yale.edu/catalog/2031355.