ELISA, Gida; KUSWANTO, Heru; KURNIAWAN, Aris; SYAR, Nur Inayah. Development of a Discovery Learning–Based Physics E-Book to Enhance Students’ Conceptual Understanding of Sound Waves. Kasuari: Physics Education Journal (KPEJ), [S. l.], v. 9, n. 1, p. 203–221, 2026. DOI: 10.37891/kpej.v9i1.1185. Disponível em: https://journalfkipunipa.org/index.php/kpej/article/view/1185. Acesso em: 17 jun. 2026.