Dyfyniad APA

World Bank, World Bank. International Economics Dept. Development Data Group, & World Bank. Development Data Group. (2012). World development indicators. The World Bank.

Dyfyniad Arddull Chicago

World Bank, World Bank. International Economics Dept. Development Data Group, and World Bank. Development Data Group. World Development Indicators. Washington, D.C.: The World Bank, 2012.

Dyfyniad MLA

World Bank, et al. World Development Indicators. The World Bank, 2012.

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