Cita APA (7a ed.)

Buck, P. W., & Travis, M. B. (1957). Control of foreign relations in modern nations. W.W. Norton.

Cita Chicago Style (17a ed.)

Buck, Philip W., y Martin Bice Travis. Control of Foreign Relations in Modern Nations. New York: W.W. Norton, 1957.

Cita MLA (9a ed.)

Buck, Philip W., y Martin Bice Travis. Control of Foreign Relations in Modern Nations. W.W. Norton, 1957.