APA (7th ed.) Citation

Wittkopf, E. R. (1999). The future of American foreign policy (3rd ed.). St. Martin's Press.

Chicago Style (17th ed.) Citation

Wittkopf, Eugene R. The Future of American Foreign Policy. 3rd ed. New York: St. Martin's Press, 1999.

MLA (9th ed.) Citation

Wittkopf, Eugene R. The Future of American Foreign Policy. 3rd ed. St. Martin's Press, 1999.