Walker, B. (1981). Welfare economics and urban problems. St. Martin's Press.
Lua i Stíl Chicago (17ú heag.)Walker, Bruce. Welfare Economics and Urban Problems. New York: St. Martin's Press, 1981.
Lua MLA (9ú heag.)Walker, Bruce. Welfare Economics and Urban Problems. St. Martin's Press, 1981.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.