Haraszewski Piotr · Justyna Waclawik Piotr Haraszewski · P. H.
| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Bezpieczny komputer | 978-83-927983-5-4 (83-927983-5-X) | 2010 |
| Narodziny Jezusa | 978-83-7492-073-5 (83-7492-073-4) | 2015 |
| Te okropne bakterie | 978-83-927983-3-0 (83-927983-3-3) | 2009 |