Poonlarp Prasongngern. (2021) Examining the Effect of "L2 Motivational Self System" on L2 Achievement of Students in a Thai University. <i>Rangsit Journal of Educational Studies</i>, <i>8</i>(1), 59-66.Poonlarp Prasongngern. "Examining the Effect of "L2 Motivational Self System" on L2 Achievement of Students in a Thai University". Rangsit Journal of Educational Studies 8 (2021):59-66.Poonlarp Prasongngern. Examining the Effect of "L2 Motivational Self System" on L2 Achievement of Students in a Thai University. Faculty of Education, Rangsit University:ม.ป.ท. 2021.