UMMAH, S. M.; ASTUTIK, A. P. Implementation of Problem Based Learning to Improve The Quality of PAI Learning During The Covid-19 Pandemic at School: Implementasi Problem Based Learning Untuk Meningkatkan Kualitas Pembelajaran PAI Selama Pandemi Covid-19 di Sekolah. Academia Open, [S. l.], v. 6, p. 10.21070/acopen.6.2022.2145, 2022. DOI: 10.21070/acopen.6.2022.2145. Disponível em: https://acopen.umsida.ac.id/index.php/acopen/article/view/2145. Acesso em: 11 sep. 2025.