Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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