MLA

Hughes, Langston, 1902-1967. "Troubled Island": Chicago. Box 476, folder 11850. 1954 Mar. https://collections.library.yale.edu/catalog/2057539.

APA, 6th edition

Hughes, Langston, 1902-1967. (["Box 476, folder 11850"])(1954 Mar)["Troubled Island": Chicago]. https://collections.library.yale.edu/catalog/2057539.