Ezrawati Nunut Nababan, Yodi Ibrahim, Judith Tagal Gallena Sinaga, and Harman Malau. “Green Marketing Strategy for Gaining Sustainable Competitive Advantage in Industry 4.0: Evidence from the Energy Sector”. Journal of Educational Management Research 5, no. 3 (April 25, 2026): 2940–2961. Accessed April 29, 2026. https://serambi.org/index.php/jemr/article/view/2147.