Sitorus, Kristiani, Enie Novieastari, Dewi Gayatri, and Tuti Nuraini. “Effectiveness of Music Therapy on Anxiety Levels and Sleep Quality in Cancer Patients: A Systematic Review”. Indonesian Journal of Global Health Research 6, no. 4 (April 29, 2024): 2135-2144. Accessed March 18, 2025. https://www.jurnal.globalhealthsciencegroup.com/index.php/IJGHR/article/view/3227.