Dyfyniad APA

World Bank. (1990). World development report 1990. Published for the World Bank, Oxford University Press.

Dyfyniad Arddull Chicago

World Bank. World Development Report 1990. New York: Published for the World Bank, Oxford University Press, 1990.

Dyfyniad MLA

World Bank. World Development Report 1990. Published for the World Bank, Oxford University Press, 1990.

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