Cita APA (7th ed.)

Rai, K. B., Walsh, D. F., & Best, P. J. (1997). America in the 21st century: Challenges and opportunities in foreign policy. Prentice Hall.

Cita Chicago (17th ed.)

Rai, Kul B., David F. Walsh, i Paul J. Best. America in the 21st Century: Challenges and Opportunities in Foreign Policy. Upper Saddle, N.J: Prentice Hall, 1997.

Cita MLA (9th ed.)

Rai, Kul B., et al. America in the 21st Century: Challenges and Opportunities in Foreign Policy. Prentice Hall, 1997.