Rangkuti, Mutia Fadhilah, and Adhi Yuniarto. “Evaluation and Development of Drinking Water Supply System (SPAM) IKK Perbaungan Serdang Bedagai Regency”. Tunas Geografi, vol. 11, no. 2, Dec. 2022, pp. 99-110, doi:10.24114/tgeo.v11i2.37354.