U.S. Equestrian Federation
United Dressage Federation
American Driving Society
United States Equestrian Team
International Olympic Committee
The Friesian Horse Society, Inc. (FHS)
The Friesian Sport Horse Registry
The Friesian Horse Association of North America
FPZV-USA
North American Friesian Journal
http://www.awhitehorse.com/webgraphics/friesian_horses.html
(Source of horse silhouette in the IFSHA Logo
Great Lakes Friesian Horse Association
Ride Magazine
Friesian Heritage Horse & Sporthorse