Cita APA (7th ed.)
World Bank & ebrary, Inc. (2011). The little green data book: 2011. World Bank.
Cita Chicago (17th ed.)
World Bank i Inc ebrary. The Little Green Data Book: 2011. Washington D.C.: World Bank, 2011.
Cita MLA (9th ed.)
World Bank i Inc ebrary. The Little Green Data Book: 2011. World Bank, 2011.
Atenció: Aquestes cites poden no estar 100% correctes.