Dewi, Ratna Sri, Indra Jaya, and Ismail Husein. “Peramalan Penerimaan Pajak Kendaraan Bermotor Menggunakan Metode Triple Exponential Smoothing Di Sumatera Utara”. Proximal: Jurnal Penelitian Matematika dan Pendidikan Matematika 7, no. 2 (May 20, 2024): 572–583. Accessed December 24, 2025. https://www.e-journal.my.id/proximal/article/view/3724.