MLA

Van Vechten, Carl, 1880-1964. Johnson, James Weldon. Box 94, folder 1671. 1932 March 20. https://collections.library.yale.edu/catalog/2025635.

APA, 6th edition

Van Vechten, Carl, 1880-1964. (["Box 94, folder 1671"])(1932 March 20)[Johnson, James Weldon]. https://collections.library.yale.edu/catalog/2025635.