APA (7th ed.) Citation

Boulding, K. E. (1965). The meaning of the twentieth century: The great transition. Allen & Unwin.

Chicago Style (17th ed.) Citation

Boulding, Kenneth Ewart. The Meaning of the Twentieth Century: The Great Transition. London: Allen & Unwin, 1965.

MLA (9th ed.) Citation

Boulding, Kenneth Ewart. The Meaning of the Twentieth Century: The Great Transition. Allen & Unwin, 1965.