MLA

Hughes, Langston, 1902-1967. Research notes. Box 275, folder 4529-4530. 1950-52. https://collections.library.yale.edu/catalog/31917453.

APA, 6th edition

Hughes, Langston, 1902-1967. (["Box 275, folder 4529-4530"])(1950-52)[Research notes]. https://collections.library.yale.edu/catalog/31917453.