Rangkuti, M.F. and Yuniarto, A. 2022. Evaluation and Development of Drinking Water Supply System (SPAM) IKK Perbaungan Serdang Bedagai Regency. Tunas Geografi. 11, 2 (Dec. 2022), 99–110. DOI:https://doi.org/10.24114/tgeo.v11i2.37354.