U. Usman, M. Ma’ruf, P. Putriana, M. W. Moh. Wardi, M. Z. Kamal, and H. Hodairiyah, “The Effectiveness of Assertive Training in Enhancing Self-Confidence Through Sundrang Learning in Bugis Elementary Schools”, Alishlah, vol. 18, no. 1, pp. 1344–1352, Apr. 2026.