MLA

Hughes, Langston, 1902-1967. Prescott School, California. Box 22, folder 341. 1906. https://collections.library.yale.edu/catalog/16207114.

APA, 6th edition

Hughes, Langston, 1902-1967. (["Box 22, folder 341"])(1906)[Prescott School, California]. https://collections.library.yale.edu/catalog/16207114.