Wattles, W. D. (2007). The science of success: The secret to getting what you want. Barnes & Noble.
Dyfyniad Arddull ChicagoWattles, Wallace D. The Science of Success: The Secret to Getting What You Want. New York: Barnes & Noble, 2007.
Dyfyniad MLAWattles, Wallace D. The Science of Success: The Secret to Getting What You Want. Barnes & Noble, 2007.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.