Niken, Niken Bekti Utami. “APPLICATION OF PROBLEM BASED LEARNING LEARNING MODELS TO IMPROVE MATHEMATICAL LEARNING RESULTS AND CRITICAL STUDENTS”. FITRAH: International Islamic Education Journal 1, no. 1 (July 31, 2019). Accessed April 26, 2025. https://journal.ar-raniry.ac.id/fitrah/article/view/32.