Dyfyniad APA

World Bank. (2003). World development indicators 2003. Washington, D. C: The World Bank.

Dyfyniad Arddull Chicago

World Bank. World Development Indicators 2003. Washington, D. C: The World Bank, 2003.

Dyfyniad MLA

World Bank. World Development Indicators 2003. Washington, D. C: The World Bank, 2003.

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