Cita APA (7th ed.)

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.