SIMANJUNTAK, Sartika Tesalonika; SUPRIYATI, Yetti; FAHDIRAN, Riser. PENGEMBANGAN BUKU ELEKTRONIK PENGAYAAN PENGETAHUAN TENTANG APLIKASI GELOMBANG ULTRASONIK UNTUK SISWA SMA. Joint Prosiding IPS dan Seminar Nasional Fisika, [S. l.], v. 8, p. SNF2019–PE, 2019. DOI: 10.21009/03.SNF2019.01.PE.03. Disponível em: https://journal.unj.ac.id/unj/index.php/prosidingsnf/article/view/13427. Acesso em: 30 may. 2026.