Maulida, Assyaffa, and Rusdi Hidayat Nugroho. “Marketing Strategy in Event Sponsorship and Social Media of PT Telkomsel Surabaya”. Business and Investment Review 3, no. 1 (January 21, 2025). Accessed November 2, 2025. https://lgdpublishing.org/index.php/birev/article/view/161.