Dyfyniad APA

World Bank & ebrary, Inc. (2013). The little green data book. World Bank.

Dyfyniad Arddull Chicago

World Bank and Inc ebrary. The Little Green Data Book. Washington, DC: World Bank, 2013.

Dyfyniad MLA

World Bank and Inc ebrary. The Little Green Data Book. World Bank, 2013.

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