Zulkarnain, Y. Aprilian, and D. . Setiawan. “Analisis Kualitas Pelayanan Di PDAM Unit Benteng Kecamatan Sungai Batang Kabupaten Indragiri Hilir”. Jurnal Indragiri Penelitian Multidisiplin, vol. 6, no. 3, Sept. 2026, pp. 326-34, https://ejournal.indrainstitute.id/index.php/jipm/article/view/1628.