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Dyfyniad Arddull ChicagoStovel, John A. Canada in the World Economy. Cambridge: Harvard univeristy press, 1967.
Dyfyniad MLAStovel, John A. Canada in the World Economy. Harvard univeristy press, 1967.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.