APA (7th ed.) Citation

Quarles, B. (1974). Allies for freedom: Blacks and John Brown. Oxford University Press.

Chicago Style (17th ed.) Citation

Quarles, Benjamin. Allies for Freedom: Blacks and John Brown. New York: Oxford University Press, 1974.

MLA (9th ed.) Citation

Quarles, Benjamin. Allies for Freedom: Blacks and John Brown. Oxford University Press, 1974.