Autori Tom Butler Bowdon(5) John Whitmore(3) John Mole(2) Richard Reeves(2) Ben Coates(2) Richard Koch(2) Denise Lee Yohn(1) Michael Hammer(1) James O Shea(1) Richard D. Lewis(1) Margot Morrell(1) Ken Blanchard(1) Stephanie Jones(1) Geoff Colvin(1) David Lewis(1) Dave Birss(1) Jon Wuebben(1) Andrew Mayo(1) Kevan Hall(1) William Bridges(1) Neil Glass(1) Donald G. Krause(1) Sandra Navidi(1) David Viney(1) Henry Kimsey-House(1)