HYPNOVISION en Suisse	www.silva-meth.ch
HYPNOVISION en Belgique	www.lamethodesilva.be
NATIONAL GUILD OF HYPNOTISTS (U.S.A.)	www.ngh.net
La METHODE SILVA	www.lamethodesilva.com
Description of courses and presentations in English	www.professionalspeakers.org/members
Guide du Mieux-Etre	www.mieux-etre.be