Hill, C. W. (2003). Global business todayCharles W.L. Hill. McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)Hill, Charles W.L. Global Business TodayCharles W.L. Hill. McGraw-Hill, 2003.
Lua MLA (8ú heag.)Hill, Charles W.L. Global Business TodayCharles W.L. Hill. McGraw-Hill, 2003.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.