Cita APA (7th ed.)
ebrary, Inc. (2001). Country and summary data. World Bank.
Cita Chicago (17th ed.)
ebrary, Inc. Country and Summary Data. Washington, D.C. ; [Great Britain]: World Bank, 2001.
Cita MLA (9th ed.)
ebrary, Inc. Country and Summary Data. World Bank, 2001.
Atenció: Aquestes cites poden no estar 100% correctes.