Sunisa Sasum และ Bruce Week. (2018) Why Some Thai Students Cannot Speak English Fluently?. Rangsit University:ม.ป.ท.Sunisa Sasum และ Bruce Week. 2018. Why Some Thai Students Cannot Speak English Fluently?. ม.ป.ท.:Rangsit University;Sunisa Sasum และ Bruce Week. Why Some Thai Students Cannot Speak English Fluently?. ม.ป.ท.:Rangsit University, 2018. Print.