Panyaporn Pantongkam และผู้แต่งคนอื่นๆ. (2023) A Causal Model of Factors Influencing English Language Achievement of Grade 6 Students in Roi-Et Primary Educational Service Area Office 2. <i>Journal of Humanities and Social Sciences Mahasarakham University</i>, <i>42</i>(3), no. 423-435.Panyaporn Pantongkam และผู้แต่งคนอื่นๆ. "A Causal Model of Factors Influencing English Language Achievement of Grade 6 Students in Roi-Et Primary Educational Service Area Office 2". Journal of Humanities and Social Sciences Mahasarakham University 42 (2023):no. 423-435.Panyaporn Pantongkam และผู้แต่งคนอื่นๆ. A Causal Model of Factors Influencing English Language Achievement of Grade 6 Students in Roi-Et Primary Educational Service Area Office 2. Mahasarakham University:ม.ป.ท. 2023.