Telaumbanua AP, Lahagu P, Waruwu E. Implementation of a Monitoring and Evaluation System to Improve the Efficiency of Goods Delivery at Ninja Express in Gunungsitoli City. JE [Internet]. 2026 Jul. 30 [cited 2026 Aug. 6];5(7):4161-74. Available from: https://ejournal.45mataram.ac.id/index.php/economina/article/view/3296