Forecasting Shallot Prices in West Sumatra Province Using the Fuzzy Time Series Method of the Singh Model and the Cheng Model. ujsds [Internet]. 9 Februari 2023 [dikutip 7 Oktober 2026];1(1):8-15. Tersedia pada: https://ujsds.ppj.unp.ac.id/index.php/ujsds/article/view/7