Cita APA

McKenzie, D. J., & World Bank. (2005). Paper walls are easier to tear down: Passport costs and legal barriers to emigration. World Bank.

Citación estilo Chicago

McKenzie, David J., y World Bank. Paper Walls Are Easier to Tear Down: Passport Costs and Legal Barriers to Emigration. [Washington, D.C]: World Bank, 2005.

Cita MLA

McKenzie, David J., y World Bank. Paper Walls Are Easier to Tear Down: Passport Costs and Legal Barriers to Emigration. World Bank, 2005.