Froyen, R. (2005). Macroeconomics (8th.). Pearson.
Cita Chicago (17th ed.)Froyen, Richard. Macroeconomics. 8th. New Delhi: Pearson, 2005.
Cita MLA (9th ed.)Froyen, Richard. Macroeconomics. 8th. Pearson, 2005.
Atenció: Aquestes cites poden no estar 100% correctes.