Kritsana Dararuang ก. ด., Sittiporn Kao-un ส. เ., and จงเกษกรณ์ เ. “Perceived Service Quality and the Marketing Mix Affecting the Hotels Customers’ Loyalty, Muang District, Nakhonsawan Province”. Dusit Thani College Journal, vol. 12, no. Special, June 2018, pp. 57-70, https://so01.tci-thaijo.org/index.php/journaldtc/article/view/129441.