Davis, K. (1975). Business And Responsibility Keith Davis. McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)Davis, Keith. Business And Responsibility Keith Davis. McGraw-Hill, 1975.
Lua MLA (8ú heag.)Davis, Keith. Business And Responsibility Keith Davis. McGraw-Hill, 1975.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.