KOTLER, P. (1999). Principles of marketing ed.8Philip Kotler, Gary Armstrong. Prentice-Hall.
Chicago (17e ed.) BronvermeldingKOTLER, Philip. Principles of Marketing Ed.8Philip Kotler, Gary Armstrong. Prentice-Hall, 1999.
MLA (8e ed.) BronvermeldingKOTLER, Philip. Principles of Marketing Ed.8Philip Kotler, Gary Armstrong. Prentice-Hall, 1999.
Let op: Deze citaties zijn niet altijd 100% accuraat.