| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| The University of Gravel Roads: Global Lessons from a Four-Year Motorcycle Adventure | 978-0-9813371-1-1 (0-9813371-1-2) | 2011 |
| The University of Gravel Roads: Global Lessons From a Four-year Motorcycle Adventure | 978-0-9813371-0-4 (0-9813371-0-4) | 2010 |
R. C. · Rene Cramer · Rene Creemers · Renée Cramer · Ron Cramer