Situmorang, S.S. and Laksono, E.W. 2025. Penerapan Problem-based Learning terhadap Kemampuan Berpikir Kritis dan Keaktifan Belajar Peserta Didik. Jurnal Pendidikan Matematika dan Sains. 13, Special_issue (Oct. 2025), 283–294. DOI:https://doi.org/10.21831/jpms.v13iSpecial_issue.89598.