Keomany, Bounpan, Veerakarrn Kanokkamalade, and Nilratana Klinchan. 2021. “The The Problems of English Speaking of Grade 12 Students at Paktha Secondary School in Laos”. Journal of MCU Humanities Review 6 (2). ิิิBankok, Thailand:277-87. https://so03.tci-thaijo.org/index.php/human/article/view/240309.