Waters, D. (2001). 101 ways to improve business performance. Kogan Page.
Lua i Stíl Chicago (17ú heag.)Waters, Donald. 101 Ways to Improve Business Performance. New Delhi: Kogan Page, 2001.
Lua MLA (9ú heag.)Waters, Donald. 101 Ways to Improve Business Performance. Kogan Page, 2001.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.