Harahap O, Utama H, Agustin R. The Influence of Digital Marketing, Social Media, and Digital Payment on Business Development Among J&T Express Agents in Medan City. jambd [Internet]. 20Oct.2026 [cited 23Oct.2026];5(4):2037-48. Available from: https://jurnal.unived.ac.id/index.php/jambd/article/view/12681