Kitda Praraththajariya,  The Design of English Materials to Communicate the Identity of Mueang District, Samut Songkram for Ecotourism.   journal   = {International Journal of Humanities and Social Sciences}, [online]. World Academy of Science, Engineering and Technology.
    April 2014, vol. 89(5). 1397 - 1400
    [viewed 26 April 2024]. Available from: https://publications.waset.org/pdf/9998240.