Nordin, M. N. A., K. Sakamoto, H. Azhari, K. Goda, M. Okamoto, H. Ito, and T. Endo. 2018. “Tensile and Impact Properties of Pulverized Oil Palm Fiber Reinforced Polypropylene Composites : A Comparison Study With Wood Fiber Reinforced Polypropylene Composites”. Journal of Mechanical Engineering and Sciences 12 (4), 4191-4202. https://doi.org/10.15282/jmes.12.4.2018.15.0361.