World Bank. (2003). World development indicators. International Bank for Reconstruction and Development.
Chicago-referens (17:e uppl.)World Bank. World Development Indicators. Washington, D.C.: International Bank for Reconstruction and Development, 2003.
MLA-referens (9:e uppl.)World Bank. World Development Indicators. International Bank for Reconstruction and Development, 2003.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.