Cita APA (7th ed.)

Combs, J. A., & Combs, A. G. (1997). The history of American foreign policy (2nd ed.). McGraw-Hill.

Cita Chicago (17th ed.)

Combs, Jerald A., i Arthur G. Combs. The History of American Foreign Policy. 2nd ed. New York: McGraw-Hill, 1997.

Cita MLA (8th ed.)

Combs, Jerald A., i Arthur G. Combs. The History of American Foreign Policy. 2nd ed. McGraw-Hill, 1997.