Published by the Elmwood Institute, Berbeley, CA 94705. Edited by "Systems Education Research", Olympia, Wa 98502, first édition, winter 1990 104 pages.
Presse Universitaires de Lille 1992 - 447.p
Infolio Editions, CH, 2010, ISBN 978 288474 575 8, 328 pages. www.infolio.ch