SAHRIM; KHOLIK, Kholilul. Optimization of Performance at PDAM Tirtanadi, North Sumatra Province. International Conference Epicentrum of Economic Global Framework, [S. l.], p. 134–144, 2025. Disponível em: https://proceeding.pancabudi.ac.id/index.php/ICEEGLOF/article/view/355. Acesso em: 15 dec. 2025.