Cita APA (7a ed.)

Barr, N. A. (2004). The economics of the welfare state (4th ed.). University Press.

Cita Chicago Style (17a ed.)

Barr, N. A. The Economics of the Welfare State. 4th ed. Oxford: University Press, 2004.

Cita MLA (9a ed.)

Barr, N. A. The Economics of the Welfare State. 4th ed. University Press, 2004.