Purba, Sara Dewanti. “Study of Forms and Meanings Simalungun Folk Song Urdo-Urdo in Bahapal Raya Village”. Gondang: Jurnal Seni dan Budaya 7, no. 1 (September 11, 2023): 282–290. Accessed May 21, 2025. http://103.242.233.34/2012/index.php/GDG/article/view/40556.