Muhammad Fendy Pradana, Mohammad Yaskun, and Evi Fijrotun. 2024. “Optimization of Customer Service Quality Using ISO 9001:2015 Principles at PT. Trust Pearl”. Jurnal Ekonomi, Akuntasi Dan Manajemen Indonesia (JEAMI) 3 (01):63-68. https://jurnal.seaninstitute.or.id/index.php/Juemi/article/view/1004.