Cullen, Countee
MLA
Hughes, Langston, 1902-1967. Cullen, Countee. Box 16, folder 160. 1875-1978. https://collections.library.yale.edu/catalog/16206956.
APA, 6th edition
Hughes, Langston, 1902-1967. (["Box 16, folder 160"])(1875-1978)[Cullen, Countee]. https://collections.library.yale.edu/catalog/16206956.