MLA

Hughes, Langston, 1902-1967. Baker, Josephine. Box 19, folder 234. 1875-1978. https://collections.library.yale.edu/catalog/16207015.

APA, 6th edition

Hughes, Langston, 1902-1967. (["Box 19, folder 234"])(1875-1978)[Baker, Josephine]. https://collections.library.yale.edu/catalog/16207015.