darwis, valeriana, Yonas Hangga Saputra, and Chairul Muslim. “Keragaan Dan Pengembangan Agribisnis Kopi Robusta Di Provinsi Lampung (Studi Kasus : Kab Tanggamus)”. Journal of Food System and Agribusiness 4, no. 2 (October 30, 2020): 83-91. Accessed April 25, 2024. https://jurnal.polinela.ac.id/JFA/article/view/1649.