Evolve Publishing · Studio Emka
| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Inspirujace uslugi | 978-83-63773-42-7 (83-63773-42-5) | 2013 |
| Uplifting Service: The Proven Path to Delighting Your Customers, Colleagues, and Everyone Else You Meet | 978-0-9847625-5-2 (0-9847625-5-8) | 2012 |