Edition Les Collections de l'INRETS 2006 ISBN : 2-85782 609 5 256 pages (rapport INRETS n° 261)
Published by the Elmwood Institute, Berbeley, CA 94705. Edited by "Systems Education Research", Olympia, Wa 98502, first édition, winter 1990 104 pages.
Palgrave MacMillan, NY, 2008, ISBN ? 13 : 978 0 230 51548 2, 365 pages.