Six Thinking Hats
Edward De Bono
Six Thinking Hats - 1st Edition in 1985 - Penguin Books 2000 - 178
9780140296662
Self Help, Personality Development
158 BON-S
Six Thinking Hats - 1st Edition in 1985 - Penguin Books 2000 - 178
9780140296662
Self Help, Personality Development
158 BON-S