Khotimah, Emy Rahmawati Isfatin, and Achmad Iswanto. “The Effectiveness of Problem-Based Learning Method Towards Student’s Critical Thinking Skills in Argumentative Essay Writing”. Innovative: Journal Of Social Science Research 4, no. 3 (June 22, 2024): 14884–14894. Accessed April 18, 2026. http://j-innovative.org/index.php/Innovative/article/view/11513.