Hari Maghfiroh and  Harry Prabowo,  Energy Efficiency Testing of Fluorescent and WOLED (White Organic LED).   journal   = {International Journal of Electrical and Computer Engineering}, [online]. World Academy of Science, Engineering and Technology.
    December 2012, vol. 72(12). 1418 - 1421
    [viewed 19 October 2019]. Available from: https://publications.waset.org/pdf/10204.