Tarigan, Ovy Frenzi, Agatha Ayiek Sih Sayekti, and Fahmi Wiryamarta Kifli. “KONDISI SOSIAL EKONOMI PETANI KOPI DI DESA GAMBER KECAMATAN SIMPANG EMPAT KABUPATEN KARO SUMATERA UTARA”. AGRIFITIA : Journal of Agribusiness Plantation 1, no. 2 (January 6, 2022): 149–158. Accessed June 14, 2026. https://jurnal.instiperjogja.ac.id/index.php/AFT/article/view/117.