APA (7th ed.) Citation

Kupchan, C. (2002). The end of the American era: U.S. foreign policy and the geopolitics of the twenty-first century. A. Knopf.

Chicago Style (17th ed.) Citation

Kupchan, Charles. The End of the American Era: U.S. Foreign Policy and the Geopolitics of the Twenty-first Century. New York: A. Knopf, 2002.

MLA (9th ed.) Citation

Kupchan, Charles. The End of the American Era: U.S. Foreign Policy and the Geopolitics of the Twenty-first Century. A. Knopf, 2002.