Hill, N., & Fotinos, J. (2010). The law of success. Penguin Audio, Magn Publishing.
Dyfyniad Arddull ChicagoHill, Napoleon, and Joel Fotinos. The Law of Success. New York : Mumbai: Penguin Audio, Magn Publishing, 2010.
Dyfyniad MLAHill, Napoleon, and Joel Fotinos. The Law of Success. Penguin Audio, Magn Publishing, 2010.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.