Kotler, P., & Armstrong, G. A. (2014). Principles of marketing (6th edition.). Frenchs Forest, N.S.W. - Pearson.
Dyfyniad Arddull ChicagoKotler, Philip, and Gary; Armstrong Armstrong. Principles of Marketing. 6th edition. Australia: Frenchs Forest, N.S.W. - Pearson, 2014.
Dyfyniad MLAKotler, Philip, and Gary; Armstrong Armstrong. Principles of Marketing. 6th edition. Frenchs Forest, N.S.W. - Pearson, 2014.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.