W.J. · Wilhelm Johannes · Wilhelm Jung
Interpet Publishing · Kennel Club Books
| title | ISBN-13 (ISBN-10) | year of publica- tion |
|---|---|---|
| Rottweiler | 978-0-9668592-2-5 (0-9668592-2-7) | 1999 |
| Rottweiler: A Comprehensive Guide to Owning and Caring for Your Dog | 978-1-59378-203-0 (1-59378-203-9) | 2003 |