Dona Tri Ardillah, et al. “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), vol. 4, no. 11, Sept. 2025, pp. 3534-60, doi:10.54443/ijset.v4i11.1180.