Cita APA (7a ed.)

Boulding, K. E. The meaning of the twentieth century: The great transition. Harper.

Cita Chicago Style (17a ed.)

Boulding, Kenneth E. The Meaning of the Twentieth Century: The Great Transition. New York: Harper.

Cita MLA (9a ed.)

Boulding, Kenneth E. The Meaning of the Twentieth Century: The Great Transition. Harper.