Ahmadi, Edris, et al. “The Effectiveness of Group Therapy of Mindfulness -Based Stress Reduction (MBSR) on Test Anxiety and Assertiveness of Dysthymia Students”. International Academic Journal of Humanities, vol. 3, no. 2, Dec. 2016, pp. 204-13, https://iaiest.com/iaj/index.php/IAJH/article/view/IAJH1510038.