MLA

Hughes, Langston, 1902-1967. Weary Blues. Box 221, folder 3689. 1926-58, n.d.. https://collections.library.yale.edu/catalog/17288851.

APA, 6th edition

Hughes, Langston, 1902-1967. (["Box 221, folder 3689"])(1926-58, n.d.)[Weary Blues]. https://collections.library.yale.edu/catalog/17288851.