Darvish, Mahdieh, et al. “A Comparison of the Effectiveness of Gestalt-Based Play Therapy and Parent-Centered Play Therapy on Academic Self-Efficacy of School Girls”. Health Psychology and Behavioral Disorders, vol. 4, no. 3, May 1405, pp. 1-16, https://www.jhpbd.com/index.php/hpbd/article/view/256.