, Harper Collins, London
Kriegel, R (1991) If It Ain't Broke ...Break it!, Warner, New York
Mattimore, B (1994) 99% Inspiration, Amacom, New York
Michalko, M (1998) Cracking Creativity, Ten Speed Press, Berkeley
Peters, T (1994) The Tom Peters Seminar, Vintage, New York
Robinson, K (2001) Out of our Minds, Capstone, Oxford
Sloane, P (1991) Lateral Thinking Puzzlers, Sterling, New York
Sloane, P (1994) Test Your Lateral Thinking IQ, Sterling, New York
Wujec, T (1995) Five Star Mind, Doubleday, Toronto