Russell Sage Foundation. (1914). Wage-earning Pittsburgh. Survey Associates.
Lua i Stíl Chicago (17ú heag.)Russell Sage Foundation. Wage-earning Pittsburgh. New York: Survey Associates, 1914.
Lua MLA (8ú heag.)Russell Sage Foundation. Wage-earning Pittsburgh. Survey Associates, 1914.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.