Williams, A., & Pitkeathley, B. (2007). Executive Express: A Swift and Practical Route to Tomorrow's Top Jobs. Indiana Publishing House.
Lua i Stíl Chicago (17ú heag.)Williams, Anthony, agus Bill Pitkeathley. Executive Express: A Swift and Practical Route to Tomorrow's Top Jobs. New Delhi: Indiana Publishing House, 2007.
Lua MLA (9ú heag.)Williams, Anthony, agus Bill Pitkeathley. Executive Express: A Swift and Practical Route to Tomorrow's Top Jobs. Indiana Publishing House, 2007.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.