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Dyfyniad Arddull ChicagoJones, J. Walter. Historical Introduction to the Theory of Law. London: Oxford University Press, 1940.
Dyfyniad MLAJones, J. Walter. Historical Introduction to the Theory of Law. Oxford University Press, 1940.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.