MLA

Van Vechten, Carl, 1880-1964. Johnson, Philip. Box 355, folder 4807. 1933 January 18. https://collections.library.yale.edu/catalog/2054392.

APA, 6th edition

Van Vechten, Carl, 1880-1964. (["Box 355, folder 4807"])(1933 January 18)[Johnson, Philip]. https://collections.library.yale.edu/catalog/2054392.