Dyfyniad APA
Lipsey, R. G., & Chrystal, K. A. (2004). Economics (10th ed.). Oxford University Press.
Dyfyniad Arddull Chicago
Lipsey, Richard G., and K. Alec Chrystal. Economics. 10th ed. Oxford ; New York: Oxford University Press, 2004.
Dyfyniad MLA
Lipsey, Richard G., and K. Alec Chrystal. Economics. 10th ed. Oxford University Press, 2004.
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