World Bank. (2001). African Development Indicators 2001. The international Bank for Reconstruction and Development.
Chicagoスタイル(17版)引用形式World Bank. African Development Indicators 2001. Washington: The international Bank for Reconstruction and Development, 2001.
MLA(9版)引用形式World Bank. African Development Indicators 2001. The international Bank for Reconstruction and Development, 2001.
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