NOVAWATI SIREGAR; RUTH RIAH ATE TARIGAN; FEBY MILANIE. Model for Optimizing the Development of Aek Sijorni Natural Bath Tourism in South Tapanuli Regency. International Journal of Mechanical, Electrical and Civil Engineering, [S. l.], v. 2, n. 3, p. 216–230, 2025. DOI: 10.61132/ijmecie.v2i3.327. Disponível em: https://international.aritekin.or.id/index.php/IJMECIE/article/view/327. Acesso em: 19 jul. 2026.