Cita APA (7th ed.)

Keen, M., & Slemrod, J. (2017). Optimal Tax Administration. International Monetary Fund.

Cita Chicago (17th ed.)

Keen, Michael, i Joel Slemrod. Optimal Tax Administration. Washington, D.C.: International Monetary Fund, 2017.

Cita MLA (8th ed.)

Keen, Michael, i Joel Slemrod. Optimal Tax Administration. International Monetary Fund, 2017.