MLA

Hughes, Langston, 1902-1967. Draft, holograph. Box 394, folder 7536. n.d.. https://collections.library.yale.edu/catalog/17394777.

APA, 6th edition

Hughes, Langston, 1902-1967. (["Box 394, folder 7536"])(n.d.)[Draft, holograph]. https://collections.library.yale.edu/catalog/17394777.