Panprae Bunyapukkna,  The Factors that Affect to the Overall Attitude toward SMS Advertising of Thai Mobile Phone Users.   journal   = {International Journal of Economics and Management Engineering}, [online]. World Academy of Science, Engineering and Technology.
    April 2016, vol. 120(12). 4032 - 4039
    [viewed 19 November 2019]. Available from: https://publications.waset.org/pdf/10007152.