Jaikhang, Jirayu, Achara Niyamabha, and Sudarat Sarnswang. 2021. “Guidelines for Academic Administration of Educational Institutions Using Dual Educational System in Bangkok Metropolis”. Rajapark Journal 15 (38). Bangkok, Thailand:137-52. https://so05.tci-thaijo.org/index.php/RJPJ/article/view/248170.