Dyfyniad APA

World Bank. (1989). World development report 1989. Published for the World Bank, Oxford University Press.

Dyfyniad Arddull Chicago

World Bank. World Development Report 1989. New York: Published for the World Bank, Oxford University Press, 1989.

Dyfyniad MLA

World Bank. World Development Report 1989. Published for the World Bank, Oxford University Press, 1989.

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