Saed, Omid, et al. “The Efficacy of Transdiagnostic Cognitive Behavior Therapy on Reducing Symptoms Severity of Obsessive Compulsive Disorder With Co-Occurring Anxiety and Mood Disorders”. International Journal of Applied Behavioral Sciences, vol. 2, no. 4, June 2015, pp. 1-10, doi:10.22037/ijabs.v2i4.11194.