Puteh, A.Q. (2022) “Comparative Study of Carotenoids Content in Ripe and Unripe Oil Palm Fresh Fruit Bunches”, International Journal of Integrated Engineering, 14(9), pp. 240–246. Available at: https://journal.uthm.edu.my/index.php/ijie/article/view/11933 (Accessed: 7 August 2026).