Bradford, D. F., & Shaviro, D. N. (1999). The Economics of Vouchers. National Bureau of Economic Research.
Cita Chicago Style (17a ed.)Bradford, David F., y Daniel N. Shaviro. The Economics of Vouchers. Cambridge, Massachusetts: National Bureau of Economic Research, 1999.
Cita MLA (9a ed.)Bradford, David F., y Daniel N. Shaviro. The Economics of Vouchers. National Bureau of Economic Research, 1999.
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