APA (7th ed.) Citation

Kupchan, C. (2003). The end of the American era: U.S. foreign policy and the geopolitics of the twenty-first century. Vintage Books.

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: Vintage Books, 2003.

MLA (9th ed.) Citation

Kupchan, Charles. The End of the American Era: U.S. Foreign Policy and the Geopolitics of the Twenty-first Century. Vintage Books, 2003.