Cita APA (7th ed.)

Preker, A. S., & Langenbrunner, J. (2004). Spending wisely: Buying health services for the poor. World Bank.

Cita Chicago (17th ed.)

Preker, Alexander S., i Jack Langenbrunner. Spending Wisely: Buying Health Services for the Poor. Washington, DC: World Bank, 2004.

Cita MLA (9th ed.)

Preker, Alexander S., i Jack Langenbrunner. Spending Wisely: Buying Health Services for the Poor. World Bank, 2004.