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Dyfyniad Arddull ChicagoStone, Brad. The Everything Store: Jeff Bezos and the Age of Amazon. New York: Brown and Company, 2013.
Dyfyniad MLAStone, Brad. The Everything Store: Jeff Bezos and the Age of Amazon. New York: Brown and Company, 2013.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.