(1) The Complete Guide to Dressage by Jennie Loriston-Clarke.

(2) The United States Dressage Federation's Web site at

(3) The International Olympic Committee's Web site at

(4) "Small and Standard Dressage Arena Letters and Dimensions" at

(5) "What are the Olympic Equestrian Sports?: at

(6) Fédération Equestre Internationale's Web site at

(7) An Expert's Guide to Basic Dressage by Jean Froissard.