"Estos Cuatro Negros Linchados," printed version
MLA
Hughes, Langston, 1902-1967. "Estos Cuatro Negros Linchados," printed version. Box 443, folder 10382. n.d.. https://collections.library.yale.edu/catalog/17034152.
APA, 6th edition
Hughes, Langston, 1902-1967. (["Box 443, folder 10382"])(n.d.)["Estos Cuatro Negros Linchados," printed version]. https://collections.library.yale.edu/catalog/17034152.