Dona Tri Ardillah, Bunga Aditi, and Sunaryo. “THE ROLE OF ENTREPRENEURIAL ORIENTATION AND MARKETING PERFORMANCE IN MAINTAINING SUSTAINABLE COMPETITIVE ADVANTAGE IN COFFEE SHOPS IN MEDAN”. International Journal of Social Science, Educational, Economics, Agriculture Research and Technology (IJSET) 4, no. 11 (September 20, 2025): 3534–3560. Accessed June 24, 2026. https://ijset.org/index.php/ijset/article/view/1180.