| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Critical Mass The 10 Explosive Powers of CEO PEER GROUPS | 978-89-04-27603-5 (89-04-27603-9) | 2008 | |
| Critical Mass The Power of CEO Guiding Principles | 978-0-9846245-2-2 (0-9846245-2-X) | 2011 | Doug Gfeller |