kanchanakhuha, K. . ., and K. . Sukpatch. “Key Performance Indicator for Innovativeness of Small-Sized Travel Enterprises in Thailand”. Dusit Thani College Journal, vol. 12, no. 3, Apr. 2020, pp. 87-101, https://so01.tci-thaijo.org/index.php/journaldtc/article/view/240950.