Diamond, J., & Pintel, G. (1972). Principles of marketing. Prentice-Hall.
Dyfyniad Arddull ChicagoDiamond, Jay, and Gerald Pintel. Principles of Marketing. Englewood Cliffs, N.J.: Prentice-Hall, 1972.
Dyfyniad MLADiamond, Jay, and Gerald Pintel. Principles of Marketing. Prentice-Hall, 1972.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.