Noviany, Henny. “The Effect of Product Diversification on the Purchase Decision of Telkomsel Loop Simcards (Case Study of Bandung State Polytechnic Students)”. Primanomics : Jurnal Ekonomi & Bisnis 18, no. 2 (May 20, 2020): 11–15. Accessed May 1, 2024. https://jurnal.ubd.ac.id/index.php/PE/article/view/347.