Cita APA

The World Bank. (2009). The little data book 2009. Washington, D.C: The World Bank.

Citación estilo Chicago

The World Bank. The Little Data Book 2009. Washington, D.C: The World Bank, 2009.

Cita MLA

The World Bank. The Little Data Book 2009. Washington, D.C: The World Bank, 2009.