Learning-by-doing: berrikuspenen arteko aldeak

* {{en}}William GLASSER, ''For Parents and Teenagers: Dissolving the Barrier Between You and Your Teen'', 2003 ISBN 0-06-000799-0

* {{en}}William GLASSER, ''WARNING: Psychiatry Can Be Hazardous to Your Mental Health'', 2004 ISBN 0-06-053866-X

 

== Bideoak ==