Alandra, C.R., Permana, D., Vionanda, D. and Fitria, D. 2025. 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. 9, 2 (Dec. 2025), 157–168. DOI:https://doi.org/10.29244/ijsa.v9i2p157-168.