Wasina Keopasom. (1991) A Survey study of the status of and practice in English pronunciation teaching at the lower secondary level in government schools in Thailand. Mahidol University,:ม.ป.ท.Wasina Keopasom. 1991. A Survey study of the status of and practice in English pronunciation teaching at the lower secondary level in government schools in Thailand. ม.ป.ท.:Mahidol University,;Wasina Keopasom. A Survey study of the status of and practice in English pronunciation teaching at the lower secondary level in government schools in Thailand. ม.ป.ท.:Mahidol University, 1991. Print.