WEISS DAVID J. (2005). LEADERSHIP GAP. JOHN WILEY & SONS.
Lua i Stíl Chicago (17ú heag.)WEISS DAVID J. LEADERSHIP GAP. MISSISSAUGA: JOHN WILEY & SONS, 2005.
Lua MLA (9ú heag.)WEISS DAVID J. LEADERSHIP GAP. JOHN WILEY & SONS, 2005.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.