Kurnianto, Kharis, et al. “Influence of Products, Premium Pricing, and Service Processes On Customer Satisfaction of Pt Asuransi Jiwa Taspen 2014-2018 Period”. International Review of Management and Marketing, vol. 8, no. 6, Nov. 2018, pp. 62-66, https://econjournals.com.tr/index.php/irmm/article/view/7136.