Sadler, P. (2004). Leadership (2nd.). Kogan Page India.
Lua i Stíl Chicago (17ú heag.)Sadler, Philip. Leadership. 2nd. New Delhi: Kogan Page India, 2004.
Lua MLA (9ú heag.)Sadler, Philip. Leadership. 2nd. Kogan Page India, 2004.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.