| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Jak zwykly Jack Welch stal sie wielkim Jackiem Welchem | 978-83-87025-89-2 (83-87025-89-5) | 2007 | Stephen Baum |
| The Inside Advantage: The Strategy that Unlocks the Hidden Growth in Your Business | 978-0-07-149569-1 (0-07-149569-X) | 2007 | Robert H. Bloom |