Cited in: Gerald Ashley, Terry Lloyd (2010), Two Speed World: The Impact of Explosive and Gradual Change, p. 103
Trevor Baylis: Frases en inglés
Cited in: Andrew Razeghi (2008), The Riddle: Where Ideas Come From and How to Have Better Ones. p. 104
Cited in: Jonathan Sutherland, Diane Canwell (2008), Essential Business Studies A Level: AS Student Book for AQA. p. 23
Cited in: Daniel H. Pink (2006), A Whole New Mind: Why Right-Brainers Will Rule the Future. p. 137