Collins Jim. (2001). Good to Great. Harper Collins.
Lua i Stíl Chicago (17ú heag.)Collins Jim. Good to Great. New York: Harper Collins, 2001.
Lua MLA (9ú heag.)Collins Jim. Good to Great. Harper Collins, 2001.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.