Tahara, A. and Irvan, I. 2026. Application of Data Mining in Predicting Demand for Blood Bags Based on Blood Type Using the Single Moving Average Method (SMA): Case Study: PMI UDD, Langkat Regency. Hanif Journal of Information Systems . 3, 1 (Jan. 2026), 54–60. DOI:https://doi.org/10.56211/hanif.v3i1.54.