WASET
    N.A.Johan and  S.R.M.Kutty and  M. H. Isa and  N.S.Muhamad and  H.Hashim,  Adsorption of Copper by using Microwave Incinerated Rice Husk Ash (MIRHA).   journal   = {International Journal of Civil and Environmental Engineering}, [online]. World Academy of Science, Engineering and Technology.
    August 2011, vol. 56(8). 346 - 350
    [viewed 11 May 2024]. Available from: https://publications.waset.org/pdf/2309.