DOUANGMANY, Seesamai, Sakhone SYSAVATHDY, and Noupheth SAKBAUVONG. “The Factors Affecting Mathematics Achievement of Grade Twelve Students in Champasak Province”. Souphanouvong University Journal Multidisciplinary Research and Development 6, no. 2 (December 5, 2020): 10–16. Accessed July 25, 2026. https://su-journal.com/index.php/su/article/view/260.