Forecasting Shallot Prices in West Sumatra Province Using the Fuzzy Time Series Method of the Singh Model and the Cheng Model. ujsds [Internet]. 12 Januari 2022 [dikutip 6 Oktober 2026];1(1):8-15. Tersedia pada: https://ujsds.ppj.unp.ac.id/index.php/ujsds/article/view/7