Smathanares, Bulanchai, Chayoot Wana, and Surapong Vatcharajit. 2019. “The Competitive Advantage Strategies of Small and Medium Sized Hotels in Bangkok”. Ph.D. In Social Sciences Journal 9 (3):584-98. https://so05.tci-thaijo.org/index.php/phdssj/article/view/141127.