Mohd Anuar Awang Idris and  Muhammad Nubli Abdul Wahab and  Nora Yusma Mohamed Yusoff,  The Significant Effect of Wudu’ and Zikr in the Controlling of Emotional Pressure Using Biofeedback Emwave Technique.   journal   = {International Journal of Psychological and Behavioral Sciences}, [online]. World Academy of Science, Engineering and Technology.
    March 2017, vol. 124(4). 849 - 855
    [viewed 22 October 2019]. Available from: https://publications.waset.org/pdf/10006775.