Dyfyniad APA

(2014). The little green data book. The World Bank.

Dyfyniad Arddull Chicago

The Little Green Data Book. Washington, District of Columbia: The World Bank, 2014.

Dyfyniad MLA

The Little Green Data Book. The World Bank, 2014.

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