APA

World Bank, . (2001). The Little Data Book 2001. Washington, D.C: The World Bank.

Chicago

World Bank, . 2001. The Little Data Book 2001. Washington, D.C: The World Bank.

Harvard

World Bank, . (2001). The Little Data Book 2001. Washington, D.C: The World Bank.

MLA

World Bank, . The Little Data Book 2001. Washington, D.C: The World Bank. 2001.