R. D. Indra, A. S. . Rachman, W. Wafiyuddin, and E. S. . Soedjono, “Strategy to Improve the Performance of The Ngagel I Water Treatment Plant (IPA) in Pdam Surya Sembada Surabaya City Through Increasing Pump Efficiency”, jist, vol. 5, no. 2, pp. 527–539, Feb. 2024.