MLA

Hughes, Langston, 1902-1967. Vincent, Sténio. Box 17, folder 214. 1875-1978. https://collections.library.yale.edu/catalog/16847720.

APA, 6th edition

Hughes, Langston, 1902-1967. (["Box 17, folder 214"])(1875-1978)[Vincent, Sténio]. https://collections.library.yale.edu/catalog/16847720.