W. K. · W. Köhler · William K. · William R. Koehler
Howell Book House · John Wiley & Sons
| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| The Koehler Method of Dog Training | 978-0-7645-4414-9 (0-7645-4414-4) | 2003 |
| The Koehler Method of Utility Dog Training | 978-0-87605-760-5 (0-87605-760-1) | 1977 |