Ali Wardana, YL Sukestiyarno, and Wardono Wardono. “The Process of Critical Thinking Ability in the PBL Model Viewed from Independent Learning”. International Conference on Science, Education, and Technology, vol. 8, no. 1, Oct. 2022, pp. 492-8, https://proceeding.unnes.ac.id/ISET/article/view/1796.