Fadillah, A. (2008) “MARKET RESEARCH: HITAMNYA KOPI INDONESIA DI PASAR KOREA”, Buletin Ilmiah Litbang Perdagangan, 2(1), pp. 56–69. Available at: https://jurnal.kemendag.go.id/index.php/bilp/article/view/162 (Accessed: 8 October 2025).