Kanthachai, Nongnout. “Quality Management Affecting the Business Performance of Tourism in Chiang Rai Province”. Journal of Thai Hospitality and Tourism 12, no. 1 (June 21, 2017): 66–82. Accessed March 29, 2024. https://so04.tci-thaijo.org/index.php/tourismtaat/article/view/90263.