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Dyfyniad Arddull ChicagoKaminski, Bartlomiej...[et al.], Zhenkun wang, and Alen winsters L. Foreign Trade in the Transition. Washington Dc: World bank, 1996.
Dyfyniad MLAKaminski, Bartlomiej...[et al.], et al. Foreign Trade in the Transition. World bank, 1996.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.