Haryadi, Rendra, Marlina Widiyanti, Muchsin Saggaf Shihab, and Ahmad Maulana. “The Effect of Product Quality on Coal Purchase Interest through Sales-Based Non-KAI Logistics at PT Bukit Asam, TBK”. International journal of business, economics and management 7, no. 4 (November 2, 2024): 168-175. Accessed April 16, 2026. https://sloap.org/journal/index.php/ijbem/article/view/2326.