DEWANTORO, Gunawan; SETIAJI, Franciscus Dalu; PRAGUSTHA, Tio. Penguat Audio Kelas D Dengan Umpan Balik Tipe Butterworth. Jurnal Nasional Teknik Elektro, [S. l.], v. 5, n. 1, p. 21–25, 2016. DOI: 10.25077/jnte.v5n1.178.2016. Disponível em: https://jnte.ft.unand.ac.id/index.php/jnte/article/view/178. Acesso em: 13 mar. 2026.