Prapart Brudhiprabha. 1993. An exploratory study of the language question in Thai society from problems to processes in educational language planning. Bangkok:Pundit Books;
Prapart Brudhiprabha. (1993) An exploratory study of the language question in Thai society from problems to processes in educational language planning (รายงานผลงานวิจัย). Pundit Books:Bangkok.
Prapart Brudhiprabha. An exploratory study of the language question in Thai society from problems to processes in educational language planning. Bangkok:Pundit Books, 1993.
Prapart Brudhiprabha. (1993) An exploratory study of the language question in Thai society from problems to processes in educational language planning (รายงานผลงานวิจัย). Pundit Books:Bangkok.