Não informado. (2001). Business and economic history. University of Illinois, Bureau of Economic and Business Research.
Lua i Stíl Chicago (17ú heag.)Não informado. Business and Economic History. Urbana, Ill: University of Illinois, Bureau of Economic and Business Research, 2001.
Lua MLA (8ú heag.)Não informado. Business and Economic History. University of Illinois, Bureau of Economic and Business Research, 2001.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.