Muphimin, Muphimin, and Delila Rambe. “Analisis Strategi Bersaing Penjual Ponsel Di Jakarta:Kajian Berdasarkan Five Forces Porter”. Jurnal Akademi Akuntansi Indonesia Padang 5, no. 1 (April 10, 2025): 1–12. Accessed July 5, 2025. https://journal.unespadang.ac.id/jaaip/article/view/397.