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Dyfyniad Arddull ChicagoFord, John C. Alcoholism; Education for Sobriety. New York: America Press, 1950.
Dyfyniad MLAFord, John C. Alcoholism; Education for Sobriety. America Press, 1950.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.