MLA

Hughes, Langston, 1902-1967. Miller, Alfred. Box 113, folder 2135. 1962. https://collections.library.yale.edu/catalog/17020436.

APA, 6th edition

Hughes, Langston, 1902-1967. (["Box 113, folder 2135"])(1962)[Miller, Alfred]. https://collections.library.yale.edu/catalog/17020436.