World Bank. (1998). World Bank atlas, 1998 ([30th ed.].). World Bank.
Cita Chicago (17th ed.)World Bank. World Bank Atlas, 1998. [30th ed.]. Washington, D.C.: World Bank, 1998.
Cita MLA (8th ed.)World Bank. World Bank Atlas, 1998. [30th ed.]. World Bank, 1998.
Atenció: Aquestes cites poden no estar 100% correctes.