Abu-Zreik, M., and A.-K. Jaradat. “Effects of the Modification of Negative Self-Statements on Reducing Academic Procrastination and Improving Academic Self-Efficacy”. Jordan Journal of Educational Sciences, vol. 9, no. 1, Nov. 2024, pp. 15-27, https://jjes.yu.edu.jo/index.php/jjes/article/view/543.