1. Handleiding Nederlandse Persoonlijkheidsvragenlijst-Junior-2/ Manual of the Dutch Personality Questionnaire-Youth- 2 (DPQ-Y-2);Barelds,2011
2. Handleiding Nederlandse Persoonlijkheidsvragenlijst 2 (NPV-2)/Manual of the Dutch Personality Questionnaire 2 (DPQ-2);Barelds,2007
3. Low extraversion and high neuroticism as indices of genetic and environmental risk for social phobia, agoraphobia, and animal phobia;Bienvenu;The American Journal of Psychiatry,2007
4. Validity of two questionnaires to assess social fears: The dutch social phobia and anxiety inventory and the fear of blushing, trembling, and sweating questionnaire;Bögels;Journal of Psychopathology and Behavioural Assesment,1999
5. Central Bureau for Statistics (2013). Bevolking: kerncijfers/Population: key figures. Retrieved from: .