P. H. · Peter Hellekalek · Peter Hölzle · Petra Hölzel
Kenilworth Press Ltd · Trafalgar Square Books
| title | ISBN-13 | year of publica- tion | other author(s) |
|---|---|---|---|
| Dressage Tips and Training Solutions | 978-1-57076-207-9 | 2001 | Wolfgang Holzel · Martin Plewa |
| Dressage Tips and Training Solutions | 978-1-872119-35-9 | 2001 | Wolfgang Holzel · Martin Plewa |
| Dressage Tips and Training Solutions Using the German Training System | 978-1-872082-52-3 | 1995 | Wolfgang Holzel · Martin Plewa |
| Learn to Ride Using Sports Psychology | 978-1-872082-86-8 | 2006 | Wolfgang Holzel |