“The Value of Customer Loyalty and Satisfaction in Antam’s Precious Metal Products (A Kano Model Analysis)”. Al-Iqtishad: Jurnal Ilmu Ekonomi Syariah 12, no. 2 (December 31, 2020). Accessed October 5, 2026. https://journal.uinjkt.ac.id/index.php/iqtishad/article/view/17028.