MLA

Hughes, Langston, 1902-1967. Langner, Lawrence. Box 20, folder 262. 1962. https://collections.library.yale.edu/catalog/16207043.

APA, 6th edition

Hughes, Langston, 1902-1967. (["Box 20, folder 262"])(1962)[Langner, Lawrence]. https://collections.library.yale.edu/catalog/16207043.