Harefa, Fitri Jessica Sanjani, Tarno ., and Di Asih I Maruddani. “Step Function Intervention Analysis on Indonesia’s Consumer Price Index (CPI)”. International Journal Of Mathematics And Computer Research 12, no. 11 (November 25, 2024): 4586-4591. Accessed May 19, 2026. https://www.ijmcr.everant.org/index.php/ijmcr/article/view/833.