Boongerd, P., C. Louhapensang, and T. Piromgarn. “STUDY AND DESIGN OF DIGITAL MEDIA FORMATS FOR PUBLIC RELATIONS FOR SECONDARY CITY TOURISM NAKHON SI THAMMARAT PROVINCE”. Journal of Industrial Education, vol. 20, no. 2, June 2021, pp. 83-95, https://ph01.tci-thaijo.org/index.php/JIE/article/view/244248.