Alandra, C. R., D. Permana, D. Vionanda, and D. Fitria. “Forecasting Foreign Tourists to West Sumatera Before and After COVID-19 Using ARIMA and Prophet and Its Impact on Foreign Exchange”. Indonesian Journal of Statistics and Its Applications, vol. 9, no. 2, Dec. 2025, pp. 157-68, doi:10.29244/ijsa.v9i2p157-168.