"The World Conference on Peace" [speech] typescript, carbon, corrected
MLA
Hughes, Langston, 1902-1967. "The World Conference on Peace" [speech] typescript, carbon, corrected. Box 448, folder 10648. 1938 Jul 24. https://collections.library.yale.edu/catalog/17034157.
APA, 6th edition
Hughes, Langston, 1902-1967. (["Box 448, folder 10648"])(1938 Jul 24)["The World Conference on Peace" [speech] typescript, carbon, corrected]. https://collections.library.yale.edu/catalog/17034157.