Παραπομπή APA
World Development Indicators. (2011). The little data book on information and communication technology 2011. Washington, D.C.: The World Bank.
Παραπομπή Chicago StyleWorld Development Indicators. The Little Data Book On Information and Communication Technology 2011. Washington, D.C.: The World Bank, 2011.
Παραπομπή MLAWorld Development Indicators. The Little Data Book On Information and Communication Technology 2011. Washington, D.C.: The World Bank, 2011.
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