M. Z. Ibrahim and  M. Z. Norashikin,  Universal Qibla and Prayer Time Finder.   journal   = {International Journal of Electrical and Computer Engineering}, [online]. World Academy of Science, Engineering and Technology.
    October 2009, vol. 34(10). 1816 - 1821
    [viewed 14 August 2020]. Available from: https://publications.waset.org/pdf/10729.