Hadi Hartono, Sinaga RM, Pujiati. Effectiveness of Controversial Issues Learning Model Through Problem Based Learning in Improving Students Critical Thinking Skills. IJELS [Internet]. 2024 Jan. 31 [cited 2026 May 27];2(1):51-68. Available from: https://journal.multitechpublisher.com/index.php/ijels/article/view/1168