S. Ishak, A. H. Awang, M. Y. Hussain, A. R. Che Omar, N. Lyndon, and A. S. Othman, “The Ethics of Middlemen Business within the Small Scale Palm Oil Production Chain”, GEOG, vol. 6, no. 3, pp. 23–34, Nov. 2018, Accessed: Dec. 06, 2025. [Online]. Available: https://ejournal.upsi.edu.my/index.php/GEOG/article/view/2097