Marhamah, Marhamah, et al. “How to Train Critical Thinking Skills? : Application of Problem-Based Learning Model Lesson Study Pattern”. Jurnal Kependidikan: Jurnal Hasil Penelitian Dan Kajian Kepustakaan Di Bidang Pendidikan, Pengajaran Dan Pembelajaran, vol. 10, no. 3, Sept. 2024, pp. 1283-91, doi:10.33394/jk.v10i3.12751.