1. ACTintervisie groep. (2006). De Nederlandstalige versie van AAQ-II. [The Dutch version of the AAQ-II]. Unpublished manuscript.
2. Diagnostic and statistical manual of mental disorders;American Psychiatric Association,1994
3. Psychological treatments;Barlow;American Psychologist,2004
4. Manual for the Beck Hopelessness Scale;Beck,1988
5. Beck Depression Inventory;Beck,1996