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Dyfyniad Arddull ChicagoFinnis, John. Fundamentals of Ethics. Washington, D.C: Georgetown University Press, 1983.
Dyfyniad MLAFinnis, John. Fundamentals of Ethics. Georgetown University Press, 1983.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.