American Kennel Club: http://www.akc.org/
United Schutzhund Clubs: http://www.germanshepherddog.com
W.U.S.V. :http://www.wusv.org/
F.C.I. : http://www.wusv.org/
O.F.A. :http://www.offa.org/
D.V.G. : http://dvgamerica.com/
Gone to the Dogs : http://gonetothedogs.com/