(2019). Fortune. New York: Michigan Economic.
Dyfyniad Arddull ChicagoFortune. New York: Michigan Economic, 2019.
Dyfyniad MLAFortune. New York: Michigan Economic, 2019.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.
(2019). Fortune. New York: Michigan Economic.
Dyfyniad Arddull ChicagoFortune. New York: Michigan Economic, 2019.
Dyfyniad MLAFortune. New York: Michigan Economic, 2019.