Sihombing, Denny Jean Cross. “Developing an Outsource Driver Management Application to Improve Cargo Company Operational Efficiency”. Jurnal Ekonomi 13, no. 01 (April 1, 2024): 2534–2544. Accessed March 6, 2026. https://ejournal.seaninstitute.or.id/index.php/Ekonomi/article/view/4290.