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Dyfyniad Arddull Chicago.Gwartney, James D. Macroeconomics: Private and Public Choice. New York: Academic Press, 1977.
Dyfyniad MLA.Gwartney, James D. Macroeconomics: Private and Public Choice. Academic Press, 1977.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.