FIRMANSYAH; GUSTINA. SISTEM PRODUKSI BIJI KOPI PT. KETIARA KABUPATEN ACEH TENGAH. JURNAL KEBANGSAAN, [S. l.], v. 9, n. 18, 2020. Disponível em: https://jurnal.uniki.ac.id/index.php/jkb/article/view/17. Acesso em: 18 des. 2024.