ANDAVA, S. P. .; REINITA. PBL-Based Electronic Teaching Materials Using Flip PDF Corporate in Elementary Schools. Journal of Education Action Research, [S. l.], v. 7, n. 3, p. 429–437, 2023. DOI: 10.23887/jear.v7i3.67328. Disponível em: https://ejournal.undiksha.ac.id/index.php/JEAR/article/view/67328. Acesso em: 2 dec. 2024.