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Dyfyniad Arddull ChicagoOxtoby, David W. Chemistry: Science of Change. Philadelphia, Pennsylvania: Saunders College, 1998.
Dyfyniad MLAOxtoby, David W. Chemistry: Science of Change. Philadelphia, Pennsylvania: Saunders College, 1998.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.