Sinta Ulina Situmorang. Model Pembelajaran Problem-Based Learning (PBL) di Masa Pandemi Covid-19 Berbantuan Powerpoint. LEARNTECH [Internet]. 2025 Apr. 30 [cited 2026 Apr. 18];1(01):23-8. Available from: http://jurnal.mifandimandiri.com/index.php/learntech/article/view/180