Keitpiriya , S., S. Busaman, K. Phetcaot, and A. Chaiwong. “SECONDARY CITY TOURIUM PROMOTION WITH DIGITAL MEDIA TECHNOLOGY”. Journal of MCU Nakhondhat, vol. 7, no. 12, Dec. 2020, pp. 436-50, https://so03.tci-thaijo.org/index.php/JMND/article/view/249124.