MLA

Van Vechten, Carl, 1880-1964. Bowles, Jane. Box 394, folder 6062. 1951 January 31. https://collections.library.yale.edu/catalog/2001971.

APA, 6th edition

Van Vechten, Carl, 1880-1964. (["Box 394, folder 6062"])(1951 January 31)[Bowles, Jane]. https://collections.library.yale.edu/catalog/2001971.