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. Faculty of Graduate Studies, Mahidol University;
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/Bangkok.
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. . Bangkok:Mahidol University, 1991.
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/Bangkok.