Liber, J. M., van Widenfelt, B. M., van der Leeden, A. J. M., Goedhart, A. W., Utens, E. M. W. J., & Treffers, P. D. A. (2010). The Relation of Severity and Comorbidity to Treatment Outcome with Cognitive Behavioral Therapy for Childhood Anxiety Disorders. Springer US.

Liber, Juliette Margo, Brigit M. van Widenfelt, Adelinde J. M. van der Leeden, Arnold W. Goedhart, Elisabeth M. W. J. Utens, و Philip D. A. Treffers. The Relation of Severity and Comorbidity to Treatment Outcome With Cognitive Behavioral Therapy for Childhood Anxiety Disorders. Springer US, 2010.

Liber, Juliette Margo, et al. The Relation of Severity and Comorbidity to Treatment Outcome With Cognitive Behavioral Therapy for Childhood Anxiety Disorders. Springer US, 2010.