Froyen, R. T. (2005). Macroeconomics: Theories and policies (8th ed.). Pearson/Prentice Hall.
Lua i Stíl Chicago (17ú heag.)Froyen, Richard T. Macroeconomics: Theories and Policies. 8th ed. Upper Saddle River, N.J: Pearson/Prentice Hall, 2005.
Lua MLA (9ú heag.)Froyen, Richard T. Macroeconomics: Theories and Policies. 8th ed. Pearson/Prentice Hall, 2005.
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