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.
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