Walt Whitman Foundation
MLA
Hughes, Langston, 1902-1967. Walt Whitman Foundation. Box 167, folder 3060. 1927. https://collections.library.yale.edu/catalog/31915930.
APA, 6th edition
Hughes, Langston, 1902-1967. (["Box 167, folder 3060"])(1927)[Walt Whitman Foundation]. https://collections.library.yale.edu/catalog/31915930.