Barr, N. A. (1998). The economics of the welfare state (3rd ed.). Stanford University Press.
Lua i Stíl Chicago (17ú heag.)Barr, N. A. The Economics of the Welfare State. 3rd ed. Stanford, Calif.: Stanford University Press, 1998.
Lua MLA (8ú heag.)Barr, N. A. The Economics of the Welfare State. 3rd ed. Stanford University Press, 1998.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.