Rizqullah R, Slamet A, Brillyantina S, Wulandari S. Application Of Demand Forecasting To Determine The Need For Purple Sweet Potatoes In The Stik Telo Ungu. JFM [Internet]. 20Oct.2025 [cited 13May2026];5(4):697-08. Available from: https://jurnal.unived.ac.id/index.php/fokusman/article/view/9486