| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| 21st Century Marketing: What it is, Why it matters and How to do it: How to Generate Word of Mouth in the Digital Age | 978-0-9956893-1-2 (0-9956893-1-8) | 2017 |
| 21st Century Marketing:What it is, why it matters and how to do it: How to Generate Word of Mouth in the Digital Age | 978-0-9956893-3-6 (0-9956893-3-4) | 2017 |