[hu] Hat gondolkodó kalap Manager
[en] Six Thinking Hats Penguin Canada
[en] Lateral Thinking Penguin
[en] Sur/petition Ebury Digital
[en] Think! · Before It's Too Late Vermilion
[en] Six Frames Ebury Digital
[en] Serious Creativity Vermilion
[en] Parallel Thinking Vermilion
[en] The Happiness Purpose Vermilion
[en] Textbook of Wisdom Ebury Digital
[en] Teach Yourself to Think Viking
[en] H+ (Plus) a New Religion Vermilion
[it] Creatività E Pensiero Laterale RCS Rizzoli Libri S.p.a.
[nl] Zes denkende hoofddeksels Contact
[en] Future Positive · Change Your Mindset for a Positive Future Vermilion
[nl] Zes Denkende Hoofddeksels Business Contact
[nl] Creatief Denken Business Contact
[en] How To Have A Beautiful Mind Vermilion