APA (7th ed.) Citation

Keen, M., & Baunsgaard, T. (2005). Tax Revenue and (or?) Trade Liberalization. International Monetary Fund.

Chicago Style (17th ed.) Citation

Keen, Michael, and Thomas Baunsgaard. Tax Revenue and (or?) Trade Liberalization. Washington, D.C.: International Monetary Fund, 2005.

MLA (8th ed.) Citation

Keen, Michael, and Thomas Baunsgaard. Tax Revenue and (or?) Trade Liberalization. International Monetary Fund, 2005.