Cita APA (7th ed.)
ebrary, Inc. (2010). World development indicators 2010. World Bank.
Cita Chicago (17th ed.)
ebrary, Inc. World Development Indicators 2010. Washington, D.C.: World Bank, 2010.
Cita MLA (9th ed.)
ebrary, Inc. World Development Indicators 2010. World Bank, 2010.
Atenció: Aquestes cites poden no estar 100% correctes.