Preker, A. S., & Langenbrunner, J. (2004). Spending wisely: Buying health services for the poor. World Bank.
Чикаго-гийн эшлэл (17 дахь хэвлэлт)Preker, Alexander S., ба Jack Langenbrunner. Spending Wisely: Buying Health Services for the Poor. Washington, DC: World Bank, 2004.
MLA -ийн эшлэл (9 дэх хэвлэлт)Preker, Alexander S., ба Jack Langenbrunner. Spending Wisely: Buying Health Services for the Poor. World Bank, 2004.