| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Let Your Fingers Do the Talking: Using Word of Mouth Advertising on the Internet | 978-0-935047-29-5 (0-935047-29-8) | 2000 | Godfrey Harris |
| Talk Is Easy!: How to Make Every Conversation Payoff | 978-0-935047-49-3 (0-935047-49-2) | 1999 | " |
C.H. · C. Hill · T. C. · T. Clarke · T.H. · Tom Clarke · Tom Hill