WASET
     W. Permchart and  S. Tanatvanit,  Study on Using the Ground as A Heat Sink for A 12,000-Btu/h Modified Air Conditioner.   journal   = {International Journal of Agricultural and Biosystems Engineering}, [online]. World Academy of Science, Engineering and Technology.
    March 2009, vol. 27(3). 120 - 123
    [viewed 23 April 2024]. Available from: https://publications.waset.org/pdf/2605.