Paris, PUF, coll. Que sais-je ? 2014, ISBN-978-2-13-063490-4, 127 p.
Ed. Eska, Pans, 1997. 156 pages.
(Préface de J.-L. Le Moigne), PUF, Le Sociologue, 1997.
Published by the Elmwood Institute, Berbeley, CA 94705. Edited by "Systems Education Research", Olympia, Wa 98502, first édition, winter 1990 104 pages.