Kotler, P., & Armstrong, G. (2008). Principles of marketing (12th ed.). Pearson/Prentice Hall.
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Dyfyniad Arddull Chicago
Kotler, Philip, and Gary Armstrong. Principles of Marketing. 12th ed. Upper Saddle River, N.J.: Pearson/Prentice Hall, 2008.
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Dyfyniad MLA
Kotler, Philip, and Gary Armstrong. Principles of Marketing. 12th ed. Pearson/Prentice Hall, 2008.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.