Budsayapun Preecharlertsilp และผู้แต่งคนอื่นๆ. (2025) A study of demotivating factors in English speaking among Thai grade 10 EFL learners. Thammasat University:ม.ป.ท.Budsayapun Preecharlertsilp และผู้แต่งคนอื่นๆ. 2025. A study of demotivating factors in English speaking among Thai grade 10 EFL learners. ม.ป.ท.:Thammasat University;Budsayapun Preecharlertsilp และผู้แต่งคนอื่นๆ. A study of demotivating factors in English speaking among Thai grade 10 EFL learners. ม.ป.ท.:Thammasat University, 2025. Print.