Editions Stock, 2015, ISBN 978-2-234-07765-2, 276 p.
Stock, 2014, ISBN 978-2- 234-07765-2
The MIT Press. Cambridge, Mass. 1995. 735 p.
Ed. ESF - Paris 1991
Published by the Elmwood Institute, Berbeley, CA 94705. Edited by "Systems Education Research", Olympia, Wa 98502, first édition, winter 1990 104 pages.
