Cita APA (7a ed.)

Keller, W., & Levinson, A. (1999). Environmental compliance cost and foreign direct investment inflows to U.S. states. National Bureau of Economic Research.

Cita Chicago Style (17a ed.)

Keller, Wolfgang, y Arik Levinson. Environmental Compliance Cost and Foreign Direct Investment Inflows to U.S. States. Cambridge, MA: National Bureau of Economic Research, 1999.

Cita MLA (9a ed.)

Keller, Wolfgang, y Arik Levinson. Environmental Compliance Cost and Foreign Direct Investment Inflows to U.S. States. National Bureau of Economic Research, 1999.