APA

Weltbank, . (2004). The little data book 2004. Washington, D.C: World Bank.

Chicago

Weltbank, . 2004. The little data book 2004. Washington, D.C: World Bank.

Harvard

Weltbank, . (2004). The little data book 2004. Washington, D.C: World Bank.

MLA

Weltbank, . The little data book 2004. Washington, D.C: World Bank. 2004.