Ediciones Oniro · HarperCollins
| title | media type | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|---|
| Hablar sin miedo: Guía práctica para superar el miedo a hablar en público | Tapa blanda | 978-84-9754-151-0 (84-9754-151-0) | 2005 |
| Speak Without Fear: A Total System for Becoming a Natural, Confident Communicator | Paperback | 978-0-06-052449-4 (0-06-052449-9) | 2005 |
| Speak Without Fear: A Total System for Becoming a Natural, Confident Communicator | Hardcover | 978-0-06-052448-7 (0-06-052448-0) | 2004 |