MLA

Hughes, Langston, 1902-1967. Library of Congress: Copyright Office. Box 102, folder 1923. 1926-65, n.d.. https://collections.library.yale.edu/catalog/32526249.

APA, 6th edition

Hughes, Langston, 1902-1967. (["Box 102, folder 1923"])(1926-65, n.d.)[Library of Congress: Copyright Office]. https://collections.library.yale.edu/catalog/32526249.