Kotler,Philip, & Armstrong,Gary. (1996). Principles of marketing (7th ed.). Prentice Hall.
Dyfyniad Arddull ChicagoKotler,Philip, and Armstrong,Gary. Principles of Marketing. 7th ed. New Delhi: Prentice Hall, 1996.
Dyfyniad MLAKotler,Philip, and Armstrong,Gary. Principles of Marketing. 7th ed. Prentice Hall, 1996.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.