Elisa, Gida, Heru Kuswanto, Aris Kurniawan, and Nur Inayah Syar. “Development of a Discovery Learning–Based Physics E-Book to Enhance Students’ Conceptual Understanding of Sound Waves”. Kasuari: Physics Education Journal (KPEJ) 9, no. 1 (June 10, 2026): 203–221. Accessed August 24, 2026. https://journalfkipunipa.org/index.php/kpej/article/view/1185.