Simanjuntak, Salomo, Eben Oktavianus Zai, and Michael Halomoan Tampubolon. “ANALISA KEBUTUHAN AIR BERSIH DI KOTA MEDAN SUMATERA UTARA”. Jurnal Visi Eksakta 2, no. 1 (January 30, 2021): 119-128. Accessed December 22, 2024. https://ejournal.uhn.ac.id/index.php/eksakta/article/view/373.