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Dyfyniad Arddull ChicagoRemack, Joachim [ed.]. First World War: Causes, Conduct, Consequences. New York: Wiley, 1971.
Dyfyniad MLARemack, Joachim [ed.]. First World War: Causes, Conduct, Consequences. Wiley, 1971.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.