Bono, E. d. (2000). Six Thinking Hats: The multi-million bestselling guide to running better meetings and making faster decisions. Penguin Life.
Lua i Stíl Chicago (17ú heag.)Bono, Edward de. Six Thinking Hats: The Multi-million Bestselling Guide to Running Better Meetings and Making Faster Decisions. UK: Penguin Life, 2000.
Lua MLA (9ú heag.)Bono, Edward de. Six Thinking Hats: The Multi-million Bestselling Guide to Running Better Meetings and Making Faster Decisions. Penguin Life, 2000.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.