“Pendapatan Dan Kerentanan Petani Kopi Robusta Di Sekitar Kawasan Taman Nasional Bukit Barisan Selatan”. Jurnal Agribisnis Indonesia, vol. 11, no. 2, Dec. 2023, pp. 220-35, https://doi.org/10.29244/jai.2023.11.2.220-235.