(2011). World development indicators 2011. The World Bank.
Chicagoスタイル(17版)引用形式World Development Indicators 2011. The World Bank, 2011.
MLA(8版)引用形式World Development Indicators 2011. The World Bank, 2011.
警告: この引用は必ずしも正確ではありません.
(2011). World development indicators 2011. The World Bank.
Chicagoスタイル(17版)引用形式World Development Indicators 2011. The World Bank, 2011.
MLA(8版)引用形式World Development Indicators 2011. The World Bank, 2011.