เวทะนา พ., อาจแก้ว จ., and ศรีจำนงค์ จ., “The development a causal model of mathematics achievement of Mathayomsomboon Sueksa 7 students at Saithany the Vientiane capital of Lao people’s democratic republic: multiple group analysis”, Trends Humanit Soc Sci Res, vol. 6, no. 2, pp. 63–83, Jun. 2019.