Williams, A., & Pitkeathley, B. (2007). Executive Express: A Swift and Practical Route to Tomorrow's Top Jobs. Indiana Publishing House.
Chicago-referens (17:e uppl.)Williams, Anthony, och Bill Pitkeathley. Executive Express: A Swift and Practical Route to Tomorrow's Top Jobs. New Delhi: Indiana Publishing House, 2007.
MLA-referens (9:e uppl.)Williams, Anthony, och Bill Pitkeathley. Executive Express: A Swift and Practical Route to Tomorrow's Top Jobs. Indiana Publishing House, 2007.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.