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Dyfyniad Arddull ChicagoAdams, F. Gerard, Lawrence Robert Klein, and Jaime R. Marquez. Economics in Theory and Practice: An Eclectic Approach. Dordrecht, The Netherlands: Kluwer Academic Pub, 1989.
Dyfyniad MLAAdams, F. Gerard, et al. Economics in Theory and Practice: An Eclectic Approach. Kluwer Academic Pub, 1989.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.