Cita APA (7a ed.)

Winter, J., & Roca, F. (2007). Muhammad Ali: Champion of the world. Schwartz & Wade Books.

Cita Chicago Style (17a ed.)

Winter, Jonah, y François Roca. Muhammad Ali: Champion of the World. New York: Schwartz & Wade Books, 2007.

Cita MLA (8a ed.)

Winter, Jonah, y François Roca. Muhammad Ali: Champion of the World. Schwartz & Wade Books, 2007.

Precaución: Estas citas no son 100% exactas.