Dyfyniad APA

The World Bank. (2008). World development indicators 2008. Washington, DC: World Bank.

Dyfyniad Arddull Chicago

The World Bank. World Development Indicators 2008. Washington, DC: World Bank, 2008.

Dyfyniad MLA

The World Bank. World Development Indicators 2008. Washington, DC: World Bank, 2008.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.