World Bank & ebrary, Inc. (2011). The little data book on information and communication technology: 2011. World Bank.
Citazione stile Chigago Style (17a edizione)World Bank e Inc ebrary. The Little Data Book on Information and Communication Technology: 2011. Washington D.C.: World Bank, 2011.
Citatione MLA (9a ed.)World Bank e Inc ebrary. The Little Data Book on Information and Communication Technology: 2011. World Bank, 2011.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.