J J ยท Jeffrey J.
| title | ISBN-13 | year of publication |
|---|---|---|
| Executive Voice Trainer/Workbook and Cassettes | 978-0-13-295791-5 | 1990 |
| How to Say It Persuasive Presentations | 978-0-7352-0411-9 | 2006 |
| How To Say It with Your Voice | 978-0-7352-0449-2 | 2009 |
| How to Say It with Your Voice | 978-0-7352-0152-1 | 2000 |
| The Art and Skill of Conversation | 978-0-13-048760-5 | 1989 |
| The Vocal Advantage | 978-0-13-103656-7 | 1996 |
| The Vocal Advantage: Develop a Dynamic Speaking Voice, Grab Listener Interest | 978-0-13-103664-2 | 1996 |