Anggraeni, Debby, and Tony Irawan. “Causality Analysis of Producer Price Index (PPI) and Consumer Price Index (CPI) in Indonesia”. JURNAL EKONOMI DAN KEBIJAKAN PEMBANGUNAN 7, no. 1 (July 1, 2018): 60-77. Accessed April 29, 2024. https://jai.ipb.ac.id/index.php/jekp/article/view/22923.