| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Breaking Your Time Barriers: Becoming a Strategic Time Manager | 978-0-13-085374-5 (0-13-085374-7) | 1991 |
| Time Is Money!: Tested Tactics That Conserve Time for Top Executives | 978-0-02-934030-1 (0-02-934030-6) | 1980 |