Doungkaewkool , N. ., and C. . Na Thalang. “GUIDELINES FOR SERVICE QUALITY DEVELOPMENT OF BOUTIQUE HOTEL’S FRONT OFFICE DEPARTMENT A STUDY OF CHIANG MAI PROVINCE”. Academic Journal of Thailand National Sports University, vol. 11, no. 3, Sept. 2019, pp. 118-33, https://he02.tci-thaijo.org/index.php/TNSUJournal/article/view/244574.