Cita APA (7th ed.)

Willis, F. R. (1987). Western civilization: A belief introduction. Macmillan.

Cita Chicago (17th ed.)

Willis, F. Roy. Western Civilization: A Belief Introduction. New York: Macmillan, 1987.

Cita MLA (9th ed.)

Willis, F. Roy. Western Civilization: A Belief Introduction. Macmillan, 1987.