MLA

Hughes, Langston, 1902-1967. "Berlin Today" [1965 Feb 5], drafts, holograph, typescript, carbon, corrected and printed version. Box 422, folder 9336. 1965. https://collections.library.yale.edu/catalog/2110175.

APA, 6th edition

Hughes, Langston, 1902-1967. (["Box 422, folder 9336"])(1965)["Berlin Today" [1965 Feb 5], drafts, holograph, typescript, carbon, corrected and printed version]. https://collections.library.yale.edu/catalog/2110175.