DARNIYANTI, Y.; SUBHAN, M. .; SARI, D. P. The Development of Problem Based Learning (PBL) Student Worksheets (Lkpd) in IPAS Learning of Sound Material and its Properties for Grade V SDN 09 Sitiung. TOFEDU: The Future of Education Journal, [S. l.], v. 3, n. 4, p. 816–822, 2024. DOI: 10.61445/tofedu.v3i4.155. Disponível em: https://journal.tofedu.or.id/index.php/journal/article/view/155. Acesso em: 12 jul. 2025.