APA (7th ed.) Citation

Hughes, L. (1969). Thirty years a slave, from bondage to freedom: Autobiography. Negro Universities Press.

Chicago Style (17th ed.) Citation

Hughes, Louis. Thirty Years a Slave, from Bondage to Freedom: Autobiography. New York: Negro Universities Press, 1969.

MLA (9th ed.) Citation

Hughes, Louis. Thirty Years a Slave, from Bondage to Freedom: Autobiography. Negro Universities Press, 1969.