Maulida, Ria, Lukytawati Anggraeni, and Samsul Hidayat Pasaribu. 2018. “Testing on Market Efficiency of the Cacao Commodity for the Futures Market in Jakarta Future Exchange”. Jurnal Manajemen Dan Agribisnis 15 (1): 53. https://doi.org/10.17358/jma.15.1.53.