Sandler, C. (1998). Secrets of the savvy consumer. Prentice Hall Press.
Dyfyniad Arddull ChicagoSandler, Corey. Secrets of the Savvy Consumer. Paramus, N.J: Prentice Hall Press, 1998.
Dyfyniad MLASandler, Corey. Secrets of the Savvy Consumer. Prentice Hall Press, 1998.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.