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Dyfyniad Arddull ChicagoHalper, Stefan, and J. Clarke. America Alone: The Neo-conservatives and the Global Order. U. K.: Cambridge University Press, 2004.
Dyfyniad MLAHalper, Stefan, and J. Clarke. America Alone: The Neo-conservatives and the Global Order. Cambridge University Press, 2004.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.