MLA

Hughes, Langston, 1902-1967. Ojike, Mbonu. Box 20, folder 285. 1875-1978. https://collections.library.yale.edu/catalog/16207062.

APA, 6th edition

Hughes, Langston, 1902-1967. (["Box 20, folder 285"])(1875-1978)[Ojike, Mbonu]. https://collections.library.yale.edu/catalog/16207062.