the World Bank. (2011). World development indicators 2011. World Bank.
Chicagoスタイル(17版)引用形式the World Bank. World Development Indicators 2011. Washington: World Bank, 2011.
MLA(9版)引用形式the World Bank. World Development Indicators 2011. World Bank, 2011.
警告: この引用は必ずしも正確ではありません.