SINAGA, N. (2019) “Vegetable Commodity Distribution System ( Case Study: Purba District, Simalungun Regency)”, SOSIAL DAN EKONOMI PERTANIAN, 13(2), pp. 38 - 50. Available at: https://jurnalfp.uisu.ac.id/index.php/sep/article/view/40 (Accessed: 19April2024).