Dyfyniad APA

Kotler, P., & Armstrong, G. (1995). Principles of marketing/6e (6th ed.). Prentice-hall.

Dyfyniad Arddull Chicago

Kotler, Philip, and Gary Armstrong. Principles of Marketing/6e. 6th ed. New Delhi: Prentice-hall, 1995.

Dyfyniad MLA

Kotler, Philip, and Gary Armstrong. Principles of Marketing/6e. 6th ed. Prentice-hall, 1995.

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