| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Time Power: The Revolutionary Time Management System That Can Change Your Professional and Personal | 978-0-06-091490-5 (0-06-091490-4) | 1988 |
| Time Power: The Revolutionary Time Management System That Can Change Your Professional and Personal Life | 978-0-06-015589-6 (0-06-015589-2) | 1987 |
C.H. · C. Hobbs · Charles D. Hobbs · Charles H. · Charles R Hobbs