Poltanee, I. ., and U. Boonphetkaew. “Foreign Tourist Satisfaction on Potential of Tourist Attractions at Pa-Ngan Island in Surat Thani Province As a Guideline to Promote Sustainable Tourism”. JOURNAL OF SOUTHERN TECHNOLOGY, vol. 11, no. 1, May 2018, pp. 13-20, https://so04.tci-thaijo.org/index.php/journal_sct/article/view/124187.