Zendrato D, Laia O. Marketing Strategy Analysis of PT Andiarta Muzizat (Ninja Express) in Maintaining Sustainability in Gunungsitoli City. EKOMBIS [Internet]. 18Jul.2026 [cited 23Jul.2026];14(3):4215-28. Available from: https://jurnal.unived.ac.id/index.php/er/article/view/9334