World Bank. (2001). African Development Indicators 2001. The international Bank for Reconstruction and Development.
Chicago (17e ed.) BronvermeldingWorld Bank. African Development Indicators 2001. Washington: The international Bank for Reconstruction and Development, 2001.
MLA (9e ed.) BronvermeldingWorld Bank. African Development Indicators 2001. The international Bank for Reconstruction and Development, 2001.