World Bank & World Bank. (2005). A guide to competitive vouchers in health. World Bank.
Chicago-čujuhus (17. p.)World Bank juo World Bank. A Guide to Competitive Vouchers in Health. Washington, DC: World Bank, 2005.
MLA-čujuhus (9. p.)World Bank juo World Bank. A Guide to Competitive Vouchers in Health. World Bank, 2005.
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