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Dyfyniad Arddull ChicagoDrexler Kater. Business Icons Who Changed the World. Boston: Harvard Business School Press, 2010.
Dyfyniad MLADrexler Kater. Business Icons Who Changed the World. Harvard Business School Press, 2010.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.