Singklieng ส., Sikkhabandit เ. and Sriprasertpap ข. (2022) “Academic Management Strategies of English Program School Under Office of the Private Education Commission (OPEC): Bangkok District”, Rajapark Journal. Bangkok, Thailand, 16(45), pp. 549–569. Available at: https://so05.tci-thaijo.org/index.php/RJPJ/article/view/257279 (Accessed: 12 August 2022).