Napitupulu, Mastiur, and Sutriningsih . “Pengaruh Terapi Musik Klasik Terhadap Lansia Penderita Insomnia”. Jurnal Kesehatan Ilmiah Indonesia (Indonesian Health Scientific Journal) 4, no. 1 (June 20, 2019): 70–75. Accessed September 12, 2026. https://jurnal.unar.ac.id/index.php/health/article/view/181.