Kartini, E., Wandra, T., Hutajulu, J., Nababan, D. and Tarigan, F.L. 2025. The Effect of Posyandu Basic Skills Training on Knowledge: A Quasi-Experimental Study on Health Workers at the Medan City Health Office in 2024. Journal of Pharmaceutical and Sciences. 8, 4 (Dec. 2025), 2879–2890. DOI:https://doi.org/10.36490/journal-jps.com.v8i4.1201.