Ngaliman, Ngaliman, Raja Rafiza, and Muammar Khaddafi. “Analysis of Customer Satisfaction of Regional Drinking Water Company Tirta Mulia Karimun the Riau Islands”. Journal of Multidisciplinary Academic Business Studies 2, no. 1 (December 2, 2024): 57–67. Accessed December 25, 2025. https://goodwoodpub.com/index.php/JoMABS/article/view/3510.