1. The Manual of Horsemanship;British Horse Society,1981
2. A fluoroscopic Study of the Position and Action of the Jointed Snaffle Bit in the Horse's Mouth;Clayton;J Eq Vet Sci,1984
3. Saddlery;Edwards,1963
4. Steeplechasing;Hislop,1970
5. The Complete Training of Horse and Rider;Podhajsky,1967