Saragih, Ronald Heriko, Junita Batubara, Happy Majesty Waruwu, and Merdiani Gulo. “The Influence of Instrumental Music Alam Menyapa for Prenatal and Postnatal Patients at the Martha Friska Multatuli Hospital”. Gondang: Jurnal Seni dan Budaya 7, no. 2 (December 18, 2023): 474–485. Accessed June 7, 2025. https://jurnal.unimed.ac.id/2012/index.php/GDG/article/view/53000.