Cita APA (7th ed.)
Boulding, K. E. (1964). The Meaning of the twentieth century: The great transition. Harper & Row.
Cita Chicago (17th ed.)
Boulding, Kenneth Ewart. The Meaning of the Twentieth Century: The Great Transition. New York: Harper & Row, 1964.
Cita MLA (9th ed.)
Boulding, Kenneth Ewart. The Meaning of the Twentieth Century: The Great Transition. Harper & Row, 1964.
Atenció: Aquestes cites poden no estar 100% correctes.