Hoover John. (2005). Unleashing Leadership. Career Press.
Lua i Stíl Chicago (17ú heag.)Hoover John. Unleashing Leadership. Lakes: Career Press, 2005.
Lua MLA (9ú heag.)Hoover John. Unleashing Leadership. Career Press, 2005.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.