the World Bank. (2011). World development indicators 2011. World Bank.
Chicago-čujuhus (17. p.)the World Bank. World Development Indicators 2011. Washington: World Bank, 2011.
MLA-čujuhus (9. p.)the World Bank. World Development Indicators 2011. World Bank, 2011.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.