| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| The Single Global Currency - Common Cents for the World | 978-0-9778426-3-6 (0-9778426-3-0) | 2008 |
| The Single Global Currency - Common Cents for the World | 978-0-9778426-2-9 (0-9778426-2-2) | 2007 |
| The Single Global Currency - Common Cents for the World | 978-0-9778426-0-5 (0-9778426-0-6) | 2006 |