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Dyfyniad Arddull ChicagoHilmes, Oliver, and Stewart Spencer. Cosima Wagner: The Lady of Bayreuth. New Haven: Yale University Press, 2010.
Dyfyniad MLAHilmes, Oliver, and Stewart Spencer. Cosima Wagner: The Lady of Bayreuth. Yale University Press, 2010.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.