Suryawan, I.P.P. et al. 2023. Controversial Mathematical Issues : Problem Based Learning on Critical Thinking. Jurnal Kependidikan: Jurnal Hasil Penelitian dan Kajian Kepustakaan di Bidang Pendidikan, Pengajaran dan Pembelajaran. 9, 3 (Sep. 2023), 808–821. DOI:https://doi.org/10.33394/jk.v9i3.8210.