Tri Yogi, et al. “Analisis Pendapatan Usaha Pengolahan Kopi Bubuk Robusta (Coffea Canephora) (Studi Kasus : UMKM Air Lanang Coffee) Kabupaten Rejang Lebong”. Jejak Digital: Jurnal Ilmiah Multidisiplin, vol. 1, no. 4, July 2025, pp. 1947-56, https://doi.org/10.63822/w10qkp64.