United States Equestrian Federation

United States Dressage Federation

California Dressage Society

Pomona Chapter of CDS

Breed Registries

Oldenburg Horse Breeder's Society

Oldenburg Registry N.A. and International Sporthorse Registry

American Warmblood Registry

American Warmblood Society

American Trakehner Association

Other Breeders

Hilltop Farm

Publications

Dressage Today

Suppliers

Dressage Extensions