MLA

Hughes, Langston, 1902-1967. Drafts, holograph and typescript, corrected. Box 383, folder 6839. n.d.. https://collections.library.yale.edu/catalog/2005526.

APA, 6th edition

Hughes, Langston, 1902-1967. (["Box 383, folder 6839"])(n.d.)[Drafts, holograph and typescript, corrected]. https://collections.library.yale.edu/catalog/2005526.