Barr, N. A. (1998). The economics of the welfare state (3rd ed.). Stanford University Press.
Cita Chicago (17th ed.)Barr, N. A. The Economics of the Welfare State. 3rd ed. Stanford, Calif.: Stanford University Press, 1998.
Cita MLA (8th ed.)Barr, N. A. The Economics of the Welfare State. 3rd ed. Stanford University Press, 1998.
Atenció: Aquestes cites poden no estar 100% correctes.