Effendi, Muhamad Azhari, and Agus Herta Sumarto. 2026. “Analysis of MNC36 Index Movements Using the Autoregressive Integrated Moving Average (ARIMA) Method During and After the COVID-19 Pandemic”. International Journal of Sustainable Applied Sciences 4 (8):1005-16. https://doi.org/10.59890/ijsas.v4i8.55.