Boonsatid, P., O. Santiwarakorm, and S. Thongkrowon. “POSHTEL : NEW TREND OF HOTEL BUSINESS IN THAILAND 4.0 ERA”. Journal of Educational Review Faculty of Education in MCU, vol. 7, no. 1, Apr. 2020, pp. 301-17, https://so02.tci-thaijo.org/index.php/EDMCU/article/view/241226.