Nurdin, Nurdin, Syafrizal Syafrizal, Elfindri Elfindri, and Syofyardi Syofyardi. “Transportation Cost and Regional Trade Perspective: Evidence of Indonesia Logistic Performance”. Opción 350 (August 13, 2019): 1182-1194. Accessed April 6, 2026. https://www.produccioncientificaluz.org/index.php/opcion/article/view/29569.