Dyfyniad APA

Kotler, P. (1994). Learning guide ; Principles of marketing (6th ed.). Prentice Hall.

Dyfyniad Arddull Chicago

Kotler, Philip. Learning Guide ; Principles of Marketing. 6th ed. New Jersey, New York: Prentice Hall, 1994.

Dyfyniad MLA

Kotler, Philip. Learning Guide ; Principles of Marketing. 6th ed. Prentice Hall, 1994.

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