MLA

Hughes, Langston, 1902-1967. Draft, typescript, carbon. Box 391, folder 7292. n.d.. https://collections.library.yale.edu/catalog/17288866.

APA, 6th edition

Hughes, Langston, 1902-1967. (["Box 391, folder 7292"])(n.d.)[Draft, typescript, carbon]. https://collections.library.yale.edu/catalog/17288866.