MLA

Hughes, Langston, 1902-1967. Bennett, Gwendolyn. Box 14, folder 317. 1925-43, n.d.. https://collections.library.yale.edu/catalog/16862301.

APA, 6th edition

Hughes, Langston, 1902-1967. (["Box 14, folder 317"])(1925-43, n.d.)[Bennett, Gwendolyn]. https://collections.library.yale.edu/catalog/16862301.