D. Syukri, M. F. . Alif, R. M. . Fiana, Y. . Atika, D. A. . Natasya, and M. . Sulthan, “Enhancing Coffee Farmers’ Knowledge of Robusta Bean Quality through "Bean-to-Cup" Training in Nagari Simpang Utara, Pasaman Regency”, And. Int. J. Social. Entre. Devel., vol. 6, no. 02, pp. 26–32, Oct. 2026.