Sangnin, Kittikun, Usa Srichaiya, and Nutthaporn Awilai. 2023. “The Factors of Service Innovation Affecting on Innovation Effectiveness and Organizational Performance of the Hotel Business in Prachuap Khiri Khan District”. Dusit Thani College Journal 17 (2):168-80. https://so01.tci-thaijo.org/index.php/journaldtc/article/view/269367.