Akkhaporn Kokkhangplu อ. . ก., and Kanokkarn Kaewnuch ก. . แ. “Guideline to Enhance Performance Efficiency on Tourism Destination in Khanom Community, Nakhon Si Thammarat Province”. Dusit Thani College Journal, vol. 11, no. special, July 2018, pp. 139-57, https://so01.tci-thaijo.org/index.php/journaldtc/article/view/136090.