Nihayaturrahmah S. Improving Students Activity and Students Learning Outcomes by Using Problem Centered Learning (PCL) Setting Numbered Head Together (NHT). AXIOMA [Internet]. 2018 Jan. 28 [cited 2025 Aug. 16];3(1):60-75. Available from: https://ejurnal.uij.ac.id/index.php/AXI/article/view/310