Rahmat Putra Ahmad Hasibuan, Nurfadhilah Ahmad Hasibuan. Digital Marketing Strategy for International Expansion: A Case Study of Doctor Helmet Medan. JUMINTAL: Jurnal Manajemen Informatika dan Bisnis Digital [Internet]. 2025 May 20 [cited 2026 Feb. 21];4(1):74-8. Available from: https://journal.literasisains.id/index.php/jumintal/article/view/5306