Winata, Reihan, Laylan Syafina, and Muhammad Harahap. “Analysis of Tahubudi Product Strategy in Facing Competition Using Porter’s Five Forces and Islamic Perspective”. SERAMBI: Jurnal Ekonomi Manajemen dan Bisnis Islam 6, no. 2 (July 6, 2024): 87-100. Accessed October 31, 2025. https://ejournal.imperiuminstitute.org/index.php/SERAMBI/article/view/1342.