Dyfyniad APA

Kotler, P. (1994). Principles of marketing / Philip Kotler, Gary Armstrong (6th ed.). Prentice-Hall.

Dyfyniad Arddull Chicago

Kotler, Philip. Principles of Marketing / Philip Kotler, Gary Armstrong. 6th ed. Englewood Cliffs: Prentice-Hall, 1994.

Dyfyniad MLA

Kotler, Philip. Principles of Marketing / Philip Kotler, Gary Armstrong. 6th ed. Prentice-Hall, 1994.

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