MLA

Van Vechten, Carl, 1880-1964. Hughes, Langston. Box 93 | Folder 1634. 1936 February 29. https://collections.library.yale.edu/catalog/2019635.

APA, 6th edition

Van Vechten, Carl, 1880-1964. (["Box 93 | Folder 1634"])(1936 February 29)[Hughes, Langston]. https://collections.library.yale.edu/catalog/2019635.