| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| The Ultimate Vocal Group Harmony Reference Guide, Volume 1: First Edition | 978-1-4196-9047-1 (1-4196-9047-7) | 2008 |
| The Ultimate Vocal Group Harmony Reference Guide, Volume 2: First Edition | 978-1-4196-9048-8 (1-4196-9048-5) | 2008 |