Sitohang, Desi Hotmaida, et al. “SEJARAH DAN MAKNA ULOS BATAK TOBA ”. Jurnal Ilmiah Widya Pustaka Pendidikan, vol. 11, no. 2, Dec. 2023, pp. 27-34, https://jiwpp.unram.ac.id/index.php/widya/article/view/116.