MLA

Hughes, Langston, 1902-1967. Scottsboro Boys. Box 474, folder 11813. n.d.. https://collections.library.yale.edu/catalog/2004887.

APA, 6th edition

Hughes, Langston, 1902-1967. (["Box 474, folder 11813"])(n.d.)[Scottsboro Boys]. https://collections.library.yale.edu/catalog/2004887.