Éditions Delachaux et Niestlé, 2013, 272 pages – ISBN 978-2- 603-01843-9
Published by the Elmwood Institute, Berbeley, CA 94705. Edited by "Systems Education Research", Olympia, Wa 98502, first édition, winter 1990 104 pages.
Edition PUF- Nouvelle Encyclopédie Diderot. Paris 1999. , ISBN 2 13 05 0104 4, 371 pages.