D B ยท Dave Boulter
| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Grapevine: The New Art of Word-of-Mouth Marketing | 978-1-59184-110-4 (1-59184-110-0) | 2005 | John Butman |
| Grapevine: Why Buzz Was a Fad but Word of Mouth Is Forever | 978-1-59184-228-6 (1-59184-228-X) | 2008 | |