Insight Publishing · Oakhill Press
| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Concrete Jungle | 978-1-60013-981-9 (1-60013-981-7) | 2012 | Bob Proctor · Annette Denk · Steve Rizzo |
| DISTINGUISHING MARKS OF A LEADER | 978-1-886939-65-3 (1-886939-65-9) | 2004 | |