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Dyfyniad Arddull ChicagoHollensen, Svend. Marketing Planning: A Global Perspective. London: McGraw-Hill, 2006.
Dyfyniad MLAHollensen, Svend. Marketing Planning: A Global Perspective. London: McGraw-Hill, 2006.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.