Trung NT. The usage of digital marketing tools among Vietnamese B2B start-ups in building customer relationships. JFMR [Internet]. 25 Tháng Bảy 2024 [cited 7 Tháng Chạp 2025];15(5):33-45. Available at: https://jfm.edu.vn/index.php/jfm/article/view/525