Citazione Stile APA (7a Edizione)

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

Citazione stile Chigago Style (17a edizione)

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

Citatione MLA (9a ed.)

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