| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| 6 Habits of Highly Effective Bosses | 978-1-56414-832-2 (1-56414-832-7) | 2005 | Vincent D. O'Connell |
| 6 Habits of Highly Effective Teams | 978-1-56414-927-5 (1-56414-927-7) | 2007 | " |
| 6 nawyków wydajnego zespolu | 978-83-246-1429-5 (83-246-1429-X) | 2019 | |
"E. K." · Kohn Stephen E. · S. E. · S.K. · Stephen E. · Stephen Kohn