Ardani, Madia Yuni, Wilis Sukmaningtyas, and Indri Heri Susanti. “Efek Natural Sound Terhadap Tingkat Kecemasan Pada Pasien Preoperasi: Systematic Literature Review”. Jurnal Altifani Penelitian dan Pengabdian kepada Masyarakat 6, no. 5 (September 10, 2026): 2753–2761. Accessed September 26, 2026. https://mail.altifani.org/index.php/altifani/article/view/1375.