WASET
    M. S. Indati and  H. A. Bekhet,  Highlighting of the Factors and Policies Affecting CO2 Emissions Level in Malaysian Transportation Sector.   journal   = {International Journal of Energy and Power Engineering}, [online]. World Academy of Science, Engineering and Technology.
    January 2014, vol. 85(1). 10 - 18
    [viewed 28 March 2024]. Available from: https://publications.waset.org/pdf/9997125.