Ardina, V. E., and Yuliawati. “Keberlanjutan Usahatani Kopi Robusta Di Desa Twelagiri, Kecamatan Pagedongan, Kabupaten Banjarnegara”. Journal of Agribusiness, Social and Economic, vol. 5, no. 1, May 2025, pp. 62-72, doi:10.32585/jase.v5i1.6007.