Keen, M., & Baunsgaard, T. (2005). Tax Revenue and (or?) Trade Liberalization. International Monetary Fund.
Cita Chicago (17th ed.)Keen, Michael, i Thomas Baunsgaard. Tax Revenue and (or?) Trade Liberalization. Washington, D.C.: International Monetary Fund, 2005.
Cita MLA (8th ed.)Keen, Michael, i Thomas Baunsgaard. Tax Revenue and (or?) Trade Liberalization. International Monetary Fund, 2005.
Atenció: Aquestes cites poden no estar 100% correctes.