JuliavianiN., SaharaS., and WinandiR. “TRANSMISI HARGA KOPI ARABIKA GAYO DI PROVINSI ACEH”. Jurnal Agribisnis Indonesia (Journal of Indonesian Agribusiness), Vol. 5, no. 1, Feb. 2018, pp. 39-56, doi:10.29244/jai.2017.5.1.39-56.