Sari, R. K. (2025). Analysis of Marketing Strategy and Responsibility in J&T Express Delivery in Ajamu Area, Panai Hulu District, Labuhanbatu Regency, North Sumatera Province. International Journal of Business, Technology and Organizational Behavior (IJBTOB), 5(1), 28–34. https://doi.org/10.52218/ijbtob.v5i1.363