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Dyfyniad Arddull ChicagoO'Connor, Karen, and Larry Sabato. American Government: Roots and Reform. Brief 2nd ed. Boston: Allyn and Bacon, 1996.
Dyfyniad MLAO'Connor, Karen, and Larry Sabato. American Government: Roots and Reform. Brief 2nd ed. Allyn and Bacon, 1996.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.