Edition l'Harmattan, collection Ingénium, ISBN : 2-7475-9256-1 2005 ? 288 pages
Published by the Elmwood Institute, Berbeley, CA 94705. Edited by "Systems Education Research", Olympia, Wa 98502, first édition, winter 1990 104 pages.
Ed. du Seuil, 1991. Paris. 187 pages.