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Dyfyniad Arddull ChicagoBeitzinger, A J. History of American Political Thought. New York: Dodd, Mead, 1972.
Dyfyniad MLABeitzinger, A J. History of American Political Thought. Dodd, Mead, 1972.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.