Irawan, Irawan, and Hendry Qurniawan. 2026. “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) 6 (01):1-7. https://jecombi.seaninstitute.or.id/index.php/JECOMBI/article/view/219.