Shifa Nurria, Sarah Widya Astuti, Mukhlisin Nata Hudin, Syarifuddin Syarifuddin, Rani Oktapiani. Peran Problem Based Learning dalam Meningkatkan Keterampilan Abad 21 pada Pembelajaran Sejarah: Systematic Literature Review . CENDEKIA [Internet]. 2026 Feb. 28 [cited 2026 Jun. 3];6(1):215-30. Available from: https://prin.or.id/index.php/cendikia/article/view/9262