Cita APA (7th ed.)
ebrary, Inc. (2012). The little green data book 2012. World Bank.
Cita Chicago (17th ed.)
ebrary, Inc. The Little Green Data Book 2012. Washington, D.C.: World Bank, 2012.
Cita MLA (9th ed.)
ebrary, Inc. The Little Green Data Book 2012. World Bank, 2012.
Atenció: Aquestes cites poden no estar 100% correctes.