Hutajulu, Petrus Oktavianus, Diana Chalil, and Surya Abadi Sembiring. “Efficiency and Marketing Margins Estimation of Oil Palm’s Fresh Fruit Bunches (FFB) in Labuhanbatu Utara and Asahan Regency”. Indonesian Journal of Agricultural Research 2, no. 2 (September 29, 2019): 67 - 76. Accessed May 4, 2024. https://talenta.usu.ac.id/InJAR/article/view/1209.