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Dyfyniad Arddull ChicagoUnruh, Gregory. Earth, Inc: Using Nature's Rules to Build Sustainable Profits. Boston: Harvard Business Press, 2010.
Dyfyniad MLAUnruh, Gregory. Earth, Inc: Using Nature's Rules to Build Sustainable Profits. Harvard Business Press, 2010.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.