Napitupulu, Haposan Orlando, Ana Arifatus Sa’diyah, and Farah Mutiara. “Integration of Indonesian Coffee Markets With World Coffee Markets”. Journal of Agricultural Socio-Economics (JASE) 2, no. 1 (August 25, 2021): 33–42. Accessed May 2, 2024. https://riset.unisma.ac.id/index.php/JASE/article/view/6865.