BUJANG, Siti Azian Azrol Nasoha; MOHD NOOR, Nor Nafizah. Kesan Pembelajaran Berasaskan Masalah (PBM) bagi Topik Ekosistem Terancam Subjek Biologi terhadap Pemikiran Kritis Pelajar: The Effect of Problem-Based Learning (PBL) for Topic of Endangered Ecosystems in Biology Towards Students’ Critical Thinking. Journal of Science and Mathematics Letters, [S. l.], v. 2, p. 54–62, 2014. Disponível em: https://ejournal.upsi.edu.my/index.php/JSML/article/view/417. Acesso em: 13 may. 2025.