Aprilianto, M., M. N. S. . Hasibuan, and S. Z. . Harahap. “Forecasting Health Sector Stock Prices Using ARIMAX Method”. Sinkron : Jurnal Dan Penelitian Teknik Informatika, vol. 6, no. 2, May 2022, pp. 641-8, doi:10.33395/sinkron.v7i2.11418.