| well-formed | ||
| valid hyphenation | ||
| ISBN-10 | 954-27-2307-5 | 9542723075 |
| ISBN-13 | 978-954-27-2307-3 | 9789542723073 |
| Agency | Bulgaria | |
| Publishers | Egmont | |
| Egmont Bulgaria | ||
| well-formed | ||
| no hyphens provided | ||
| ISBN-10 | 954-27-2306-7 | 9542723067 |
| ISBN-13 | 978-954-27-2306-6 | 9789542723066 |
| Agency | Bulgaria | |
| Publishers | Egmont | |
| Egmont Bulgaria | ||
| well-formed | ||
| no hyphens provided | ||
| ISBN-10 | 954-27-2308-3 | 9542723083 |
| ISBN-13 | 978-954-27-2308-0 | 9789542723080 |
| Agency | Bulgaria | |
| Publishers | Egmont | |
| Egmont Bulgaria | ||
| well-formed | ||
| no hyphens provided | ||
| ISBN-10 | 954-27-2312-1 | 9542723121 |
| ISBN-13 | 978-954-27-2312-7 | 9789542723127 |
| Agency | Bulgaria | |
| Publishers | Egmont | |
| Egmont Bulgaria | ||
| well-formed | ||
| no hyphens provided | ||
| ISBN-10 | 954-27-2309-1 | 9542723091 |
| ISBN-13 | 978-954-27-2309-7 | 9789542723097 |
| Agency | Bulgaria | |
| Publishers | Egmont | |
| Egmont Bulgaria | ||
| well-formed | ||
| no hyphens provided | ||
| ISBN-10 | 954-27-2310-5 | 9542723105 |
| ISBN-13 | 978-954-27-2310-3 | 9789542723103 |
| Agency | Bulgaria | |
| Publishers | Egmont | |
| Egmont Bulgaria | ||
| well-formed | ||
| no hyphens provided | ||
| ISBN-10 | 954-27-2311-3 | 9542723113 |
| ISBN-13 | 978-954-27-2311-0 | 9789542723110 |
| Agency | Bulgaria | |
| Publishers | Egmont | |
| Egmont Bulgaria | ||