RIAH ATE TARIGAN, R. .; SETYANINGRUM, S.; HAFIS, M. STRATEGI PENGEMBANGAN USAHATANI TANAMAN KOPI (Coffea arabika) . Penerbit Tahta Media, [S. l.], 2023. Disponível em: https://tahtamedia.co.id/index.php/issj/article/view/383. Acesso em: 28 apr. 2026.