Não informado. (1953). Business topics. Michigan State University, Bureau of Business and Economic Research.
Lua i Stíl Chicago (17ú heag.)Não informado. Business Topics. East Lansing, Mich: Michigan State University, Bureau of Business and Economic Research, 1953.
Lua MLA (8ú heag.)Não informado. Business Topics. Michigan State University, Bureau of Business and Economic Research, 1953.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.