World Bank & ebrary, Inc. (2011). The little data book on information and communication technology: 2011. World Bank.
Chicagoスタイル(17版)引用形式World Bank , Inc ebrary. The Little Data Book on Information and Communication Technology: 2011. Washington D.C.: World Bank, 2011.
MLA(9版)引用形式World Bank , Inc ebrary. The Little Data Book on Information and Communication Technology: 2011. World Bank, 2011.
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