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Dyfyniad Arddull ChicagoGerstner, Louis V. Who Says Elephants Can't Dance?: Inside IBM's Historic Turnaround. New York: HarperBusiness, 2002.
Dyfyniad MLAGerstner, Louis V. Who Says Elephants Can't Dance?: Inside IBM's Historic Turnaround. HarperBusiness, 2002.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.