Brata, A.S. et al. 2021. Average Based Length Fuzzy Time Series Data Seasonal untuk Prediksi Volume Impor Migas Indonesia. Jurnal Ekonomi Manajemen dan Sekretari. 6, 1 (Aug. 2021), 15–21. DOI:https://doi.org/10.35870/jemensri.v6i1.1764.