APA aipamena

World Bank. (1991). World development report 1991: The challenge of development. Oxford University Press.

Chicago Style aipamena

World Bank. World Development Report 1991: The Challenge of Development. Oxford: Oxford University Press, 1991.

MLA aipamena

World Bank. World Development Report 1991: The Challenge of Development. Oxford University Press, 1991.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.