ebrary, Inc. (2004). A guide to competitive vouchers in health. World Bank.
Cita Chicago (17th ed.)ebrary, Inc. A Guide to Competitive Vouchers in Health. Washington, DC: World Bank, 2004.
Cita MLA (9th ed.)ebrary, Inc. A Guide to Competitive Vouchers in Health. World Bank, 2004.
Atenció: Aquestes cites poden no estar 100% correctes.