Sakhila C, Nasution FN, Pratomo WA. STRATEGY TO ENHANCE THE COMPETITIVENESS OF COFFEE BEAN EXPORTERS IN NORTH SUMATRA. IIJSE [Internet]. 3Jun.2026 [cited 28Jul.2026];9(2):12822-31. Available from: https://e-journal.uac.ac.id/index.php/iijse/article/view/10324