Lilmuttaqiin, Arsala, Annora Pratama Putri, and Moh. Herris Setiawan. 2025. “EKONOMI PERKEBUNAN NUSANTARA TAHUN 1830-1930: AFDELING MALANG SEBAGAI JANTUNG KOPI”. Journal of Economics, Education, Business and Managements 1 (02):41-50. https://www.journal.penmudin.com/index.php/JEEBM/article/view/14.