IRAWAN, I.; HENDRY QURNIAWAN. Building Competitive Advantage for Local Coffee Products in North Sumatra: A SWOT-Based Analysis of Digital Marketing and Value-Added Innovation. Journal of Economics and Business (JECOMBI), [S. l.], v. 6, n. 01, p. 1–7, 2026. Disponível em: https://jecombi.seaninstitute.or.id/index.php/JECOMBI/article/view/219. Acesso em: 1 aug. 2026.