MLA

Hughes, Langston, 1902-1967. Beadenkopf, Anne. Box 25 (Oversize), folder 370. 1941. https://collections.library.yale.edu/catalog/16207137.

APA, 6th edition

Hughes, Langston, 1902-1967. (["Box 25 (Oversize), folder 370"])(1941)[Beadenkopf, Anne]. https://collections.library.yale.edu/catalog/16207137.