MLA

Hughes, Langston, 1902-1967. Drafts, typescript and carbon. Box 378, folder 6446. n.d.. https://collections.library.yale.edu/catalog/17288859.

APA, 6th edition

Hughes, Langston, 1902-1967. (["Box 378, folder 6446"])(n.d.)[Drafts, typescript and carbon]. https://collections.library.yale.edu/catalog/17288859.