Blue Guides · W. W. Norton & Company
| title | ISBN-13 | year of publica- tion |
|---|---|---|
| Blue Guide Sicily | 978-1-905131-12-9 | 2006 |
| Blue Guide Sicily, Seventh Edition | 978-0-393-32889-9 | 2006 |
| Blue Guide Sicily, Sixth Edition | 978-0-393-32470-9 | 2003 |
| Blue Guide The Marche and San Marino | 978-1-905131-14-3 | 2006 |
| Blue Guide The Marche, First Edition | 978-0-393-32888-2 | 2006 |