World Bank. (2002). African Development Indicators 2002. the international bank for reconstruction and development.
芝加哥风格引文World Bank. African Development Indicators 2002. Washington: the international bank for reconstruction and development, 2002.
MLA引文World Bank. African Development Indicators 2002. the international bank for reconstruction and development, 2002.
警告：这些引文格式不一定是100％准确.