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Dyfyniad Arddull ChicagoWilmshurst, John. The Fundamentals and Practice of Marketing. 2nd ed. London: Heinemann, 1984.
Dyfyniad MLAWilmshurst, John. The Fundamentals and Practice of Marketing. 2nd ed. Heinemann, 1984.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.