Luekveerawattana, R. (2019). The Study of Comparing Satisfaction of Visitors at Ecotourism Site, Koh Kret, Nonthaburi. Journal of Multidisciplinary Academic Research and Development (JMARD), 1(2), 42–52. retrieved from https://he02.tci-thaijo.org/index.php/JMARD/article/view/173798