SINGSRI, PONGPAT, Srichol Phiromlap, and Sahapat Chalachai. 2021. “Design and Development of 6-D Digital Secure City System Bang Phra Sub-District Municipality”. Rajamangala University of Technology Tawan-Ok Research Journal 14 (1). Chonburi, Thailand:54-65. https://li01.tci-thaijo.org/index.php/researchjournal2rmutto/article/view/243529.