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Dyfyniad Arddull ChicagoStephens, Otis H Scheb. American Constitutional Law. 3rd ed. Australia: Thomson West, 2003.
Dyfyniad MLAStephens, Otis H Scheb. American Constitutional Law. 3rd ed. Thomson West, 2003.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.