Imprint Academic 2010, ISBN 9781845401863 266 pages
Sense Publishers, Rotterdam, the Netherland , 2007, ISBN : 978 90 8790 085 4, 323 pages.
Edition l'Harmattan, collection Ingénium, ISBN : 2-7475-9256-1 2005 ? 288 pages
Intersystems Publication - 1988 349 p.
Bruxelles, De Boeck Université, Collection Pédagogie, 1997.
Published by the Elmwood Institute, Berbeley, CA 94705. Edited by "Systems Education Research", Olympia, Wa 98502, first édition, winter 1990 104 pages.
Ed. The Falmer Press. Londres. 1995. 213 page