Purba N, Sutikno. Oral Literature of the Batak Society "Si Jonaha" and its Implications in Teaching Materials for Students of SMP Negeri 4 Satu Atap Pulau Rakyat Academic Year 2022-2023. Int. j. soc. sci. humanit. invent. [Internet]. 2023 Mar. 21 [cited 2024 Jul. 22];10(03):7784-8. Available from: http://valleyinternational.net/index.php/theijsshi/article/view/3884