Ladda Sumrongpan และ Waraporn Erawan. (2023) A Synthesis of Problem and Guidelines for Promoting Literacy of Thai Language Subject Area in First Grade. <i>Journal of Humanities and Social Sciences Mahasarakham University</i>, <i>42</i>(4), no. 584-602.Ladda Sumrongpan และ Waraporn Erawan. "A Synthesis of Problem and Guidelines for Promoting Literacy of Thai Language Subject Area in First Grade". Journal of Humanities and Social Sciences Mahasarakham University 42 (2023):no. 584-602.Ladda Sumrongpan และ Waraporn Erawan. A Synthesis of Problem and Guidelines for Promoting Literacy of Thai Language Subject Area in First Grade. Mahasarakham University:ม.ป.ท. 2023.