MLA

Hughes, Langston, 1902-1967. Kay, Ulysses, and family. Box 469, folder 11555. 1951-52. https://collections.library.yale.edu/catalog/33548994.

APA, 6th edition

Hughes, Langston, 1902-1967. (["Box 469, folder 11555"])(1951-52)[Kay, Ulysses, and family]. https://collections.library.yale.edu/catalog/33548994.