Gumjudpai, T., and T. . Sittiwong. “THE STUDY OF REPRESENTATION OF THAI NATIONAL LOYALTY OF THE CHAN PALACE HISTORICAL CENTER: A STUDY FOR PROMOTION BY SELF-DIRECTED LEARNING”. JOURNAL OF EDUCATION NARESUAN UNIVERSITY, vol. 22, no. 2, Feb. 2020, pp. 125-34, https://so06.tci-thaijo.org/index.php/edujournal_nu/article/view/229685.