MLA

Hughes, Langston, 1902-1967. [Poems], typescript. Box 443, folder 10373. 1948 May 14. https://collections.library.yale.edu/catalog/17034151.

APA, 6th edition

Hughes, Langston, 1902-1967. (["Box 443, folder 10373"])(1948 May 14)[[Poems], typescript]. https://collections.library.yale.edu/catalog/17034151.