W K. · W. Köhler · William R. Koehler
Howell Book House · John Wiley & Sons
| title | ISBN-13 (ISBN-10) | year of publica- tion |
|---|---|---|
| The Koehler Method of Dog Training | 978-0-7645-4414-9 (0-7645-4414-4) | 2004 |
| The Koehler Method of Utility Dog Training | 978-0-87605-760-5 (0-87605-760-1) | 1977 |