Dyfyniad APA

Kotler, P., & Armstrong, G. (1997). Principles of marketing (7th ed.). Prentice Hall of India.

Dyfyniad Arddull Chicago

Kotler, Philip, and Gary Armstrong. Principles of Marketing. 7th ed. New Delhi: Prentice Hall of India, 1997.

Dyfyniad MLA

Kotler, Philip, and Gary Armstrong. Principles of Marketing. 7th ed. Prentice Hall of India, 1997.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.