| well-formed | ||
| no hyphens provided | ||
| ISBN-10 | 88-7782-702-5 | 8877827025 |
| ISBN-13 | 978-88-7782-702-9 | 9788877827029 |
| Agency | Italy | |
| Publisher | Salani Editore | |
| well-formed | ||
| no hyphens provided | ||
| ISBN-10 | 88-8451-235-2 | 8884512352 |
| ISBN-13 | 978-88-8451-235-2 | 9788884512352 |
| Agency | Italy | |
| Publisher | Salani Editore | |
| not well-formed | |||||||||
| no hyphens provided | |||||||||
| The UCC prefix is malformed (should be 978 or 979). | |||||||||
| The check-digit is correct. | |||||||||
| well-formed | ||
| no hyphens provided | ||
| ISBN-10 | 88-8451-610-2 | 8884516102 |
| ISBN-13 | 978-88-8451-610-7 | 9788884516107 |
| Agency | Italy | |
| Publisher | Salani Editore | |
| well-formed | ||
| no hyphens provided | ||
| ISBN-10 | 88-88838-67-8 | 8888838678 |
| ISBN-13 | 978-88-88838-67-0 | 9788888838670 |
| Agency | Italy | |
| Publisher | Edizioni Angolo Manzoni | |
| not well-formed | |||||||||
| no hyphens provided | |||||||||
| The check-digit is not correct. If the rest of the ISBN is correct (and it may not be), the check digit should be: 0. | |||||||||
| Correcting check-digit gives: 978-88-88838-67-0 which appears to be valid. The governing agency is: Italy. | |||||||||
| well-formed | ||
| no hyphens provided | ||
| ISBN-10 | 88-6256-168-7 | 8862561687 |
| ISBN-13 | 978-88-6256-168-6 | 9788862561686 |
| Agency | Italy | |
| Publisher | Salani Editore | |