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"Ralph Ellison". Robert Penn Warren's Who Speaks for the Negro? Archive. Robert Penn Warren Center for the Humanities, Vanderbilt University. Retrieved January 21, 2015.
Bradley, Adam (2010). Ralph Ellison in Progress: The Making and Unmaking of One Writer's Great American Novel. New Haven: Yale University Press. p.22. ISBN978-0300147131. OCLC5559544694.