Lubis, D. A., Johra, M. B., & Darmawan, G. (2017). Peramalan Indeks Harga Konsumen dengan Metode Singular Spectral Analysis (SSA) dan Seasonal Autoregressive Integrated Moving Average (SARIMA). Jurnal Matematika MANTIK, 3(2), 74–82. https://doi.org/10.15642/mantik.2017.3.2.74-82