the World Bank. (2008). Doing Business 2008. World Bank Group.
Cita Chicago (17th ed.)the World Bank. Doing Business 2008. Washington: World Bank Group, 2008.
Cita MLA (9th ed.)the World Bank. Doing Business 2008. World Bank Group, 2008.
Atenció: Aquestes cites poden no estar 100% correctes.