K. Kamilin, M. Effendy, R. Al Atok, and Ach. Rasyad, “Self-Concept and Self-Efficacy Beliefs as Determinants of Success among Equality Non-Formal Education Learners”, J.Gen.Educ.Humanit., vol. 5, no. 3, pp. 3381–3392, Jun. 2026.