WASET
    T. Utarasakul,  Environmental Management System for Tourist Accommodations in Amphawa, Samut Songkram,Thailand.   journal   = {International Journal of Economics and Management Engineering}, [online]. World Academy of Science, Engineering and Technology.
    August 2012, vol. 68(8). 1996 - 2000
    [viewed 02 May 2024]. Available from: https://publications.waset.org/pdf/10875.