Worawan Supat. 1995. A diary study of the quantity of English language input available to a Thai secondary school student. Bangkok:Sri Nakharinwirot University;
Worawan Supat. (1995) A diary study of the quantity of English language input available to a Thai secondary school student (รายงานผลงานวิจัย). Sri Nakharinwirot University:Bangkok.
Worawan Supat. A diary study of the quantity of English language input available to a Thai secondary school student. Bangkok:Sri Nakharinwirot University, 1995.
Worawan Supat. (1995) A diary study of the quantity of English language input available to a Thai secondary school student (รายงานผลงานวิจัย). Sri Nakharinwirot University:Bangkok.