Jamaluddin, M. ., M. . Mustaji, and B. S. . Bahri. “Effect of Blended Learning Models and Self-Efficacy on Mathematical Problem-Solving Ability”. International Journal of Learning, Teaching and Educational Research, vol. 21, no. 7, July 2022, pp. 127-44, https://ijlter.net/index.php/ijlter/article/view/1362.