Sinta Ulina Situmorang. 2025. “Model Pembelajaran Problem-Based Learning (PBL) Di Masa Pandemi Covid-19 Berbantuan Powerpoint”. LEARNTECH: Jurnal Teknologi Pendidikan 1 (01):23-28. http://jurnal.mifandimandiri.com/index.php/learntech/article/view/180.