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Dyfyniad Arddull ChicagoCharles W.L.Hill. Strategic Management. 4th ed. New York: Houghton Mifflin Company, 2000.
Dyfyniad MLACharles W.L.Hill. Strategic Management. 4th ed. Houghton Mifflin Company, 2000.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.