MLA

Hughes, Langston, 1902-1967. Brooks, Gwendolyn. Box 23, folder 479-480. 1942-66, n.d.. https://collections.library.yale.edu/catalog/17234824.

APA, 6th edition

Hughes, Langston, 1902-1967. (["Box 23, folder 479-480"])(1942-66, n.d.)[Brooks, Gwendolyn]. https://collections.library.yale.edu/catalog/17234824.