BRISTOW N. (2003). LEADERSHIP SKILLS AUDIT. CSP LTD.
Lua i Stíl Chicago (17ú heag.)BRISTOW N. LEADERSHIP SKILLS AUDIT. U K: CSP LTD, 2003.
Lua MLA (9ú heag.)BRISTOW N. LEADERSHIP SKILLS AUDIT. CSP LTD, 2003.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.