Sihombing, Denny Jean Cross. “Agile-Based CRM System Development to Improve Customer Satisfaction in Cargo Companies”. Jurnal Ekonomi 13, no. 01 (March 27, 2024): 2344–2353. Accessed December 21, 2024. https://ejournal.seaninstitute.or.id/index.php/Ekonomi/article/view/4247.