GandhyA., Harianto, NurmalinaR., & Suharno. (2022). The Efficiency of The Spot Market And Crude Palm Oil (CPO) Commodity Futures Market Before and During The Covid-19 Pandemic in Indonesia. Jurnal Manajemen & Agribisnis, 19(1), 139. https://doi.org/10.17358/jma.19.1.139