Williamson, S. D. (2011). Macroeconomics (4th ed.). Addison-Wesley.
Tohutoru Kātū Chicago (17th ed.)Williamson, Stephen D. Macroeconomics. 4th ed. Boston: Addison-Wesley, 2011.
Tohutoro MLA (9th ed.)Williamson, Stephen D. Macroeconomics. 4th ed. Addison-Wesley, 2011.
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