WASET
    C. Chaiyaraksa and  T. Khamko,  Heavy Metal Reduction in Plant Using Soil Amendment.   journal   = {International Journal of Environmental and Ecological Engineering}, [online]. World Academy of Science, Engineering and Technology.
    March 2019, vol. 148(4). 226 - 230
    [viewed 28 March 2024]. Available from: https://publications.waset.org/pdf/10010272.