World Bank & Preker, A. S. (2007). Public ends, private means: Strategic purchasing of health services. World Bank.
Chicago (17e ed.) BronvermeldingWorld Bank en Alexander S. Preker. Public Ends, Private Means: Strategic Purchasing of Health Services. Washington, D.C.: World Bank, 2007.
MLA (9e ed.) BronvermeldingWorld Bank en Alexander S. Preker. Public Ends, Private Means: Strategic Purchasing of Health Services. World Bank, 2007.