MLA

Hughes, Langston, 1902-1967. Loose page drafts, typescript and carbon, corrected by LH. Box 337, folder 5497. n.d.. https://collections.library.yale.edu/catalog/31918983.

APA, 6th edition

Hughes, Langston, 1902-1967. (["Box 337, folder 5497"])(n.d.)[Loose page drafts, typescript and carbon, corrected by LH]. https://collections.library.yale.edu/catalog/31918983.