Bagby, W. M. (1999). America's international relations since World War I. New York: Oxford University Press.
Dyfyniad Arddull ChicagoBagby, Wesley Marvin. America's International Relations Since World War I. New York: Oxford University Press, 1999.
Dyfyniad MLABagby, Wesley Marvin. America's International Relations Since World War I. New York: Oxford University Press, 1999.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.