Abd Wahab, Hanani, Anika Zafiah Mohd Rus, and M. Taufiq Zaliran. 2018. “Design of Experiment for In-Situ Synthesis of Waste Vegetable Oils and Synthetic Based Polyurethane (PU) Foam Composites”. International Journal of Engineering & Technology 7 (4.34): 413-16. https://doi.org/10.14419/ijet.v7i4.34.26898.