Aprilianto, Muhammad, Mila Nirmala Sari Hasibuan, and Syaiful Zuhri Harahap. 2022. “Forecasting Health Sector Stock Prices Using ARIMAX Method”. Sinkron : Jurnal Dan Penelitian Teknik Informatika 6 (2):641-48. https://doi.org/10.33395/sinkron.v7i2.11418.