WASET
    Fu E. Tang and  Vun J. Ngu,  A Study of Performance of Wastewater Treatment Systems for Small Sites.   journal   = {International Journal of Environmental and Ecological Engineering}, [online]. World Academy of Science, Engineering and Technology.
    December 2011, vol. 60(12). 804 - 810
    [viewed 03 May 2024]. Available from: https://publications.waset.org/pdf/12331.