Septianingtyas Purwandhini, Ari, Endang Wahyu Pudjiastutik, dan Nuril Exwin Suhaeriyah. “Analisis Perwilayahan Komoditas Kopi”. Jurnal Sosial Ekonomi Pertanian 19, no. 2 (Juni 25, 2023): 167–178. Diakses Mei 23, 2026. https://journal.unhas.ac.id/index.php/jsep/article/view/25124.