Pontanya, Araya, Janyaporn Jiamjaroenkul, Kulvadee Thongpibul, Chaiyun Sakulsriprasert, Siree Udomphol, Siwaporn Tuitemwong, Wansiri Panyo, and Savika Chaiboonyarak. 2020. “Examining the Factor Structure of the Standardized Achievement Test for Thai Learners”. Journal of the Psychiatric Association of Thailand 65 (2), 117-30. https://he01.tci-thaijo.org/index.php/JPAT/article/view/243543.