Sasmita RS, Harjono N. Efektivitas Model Problem Based Learning dan Problem Posing dalam Meningkatkan Kemampuan Berpikir Kritis Siswa Sekolah Dasar. basicedu [Internet]. 2021 Aug. 22 [cited 2024 Dec. 22];5(5):3472-81. Available from: https://jbasic.org/index.php/basicedu/article/view/1313