MLA

Van Vechten, Carl, 1880-1964. Johnson, James Weldon, at his home, Five Acres, Great Barrington, Massachusetts. Box 94, folder 1673. 1936 July 15. https://collections.library.yale.edu/catalog/2025614.

APA, 6th edition

Van Vechten, Carl, 1880-1964. (["Box 94, folder 1673"])(1936 July 15)[Johnson, James Weldon, at his home, Five Acres, Great Barrington, Massachusetts]. https://collections.library.yale.edu/catalog/2025614.