Anchalee Wannaruk. 1989. An investigation into the research of foreign language teachers in Bangkok government secondary schools. Bangkok:Mahidol University;

Anchalee Wannaruk. An investigation into the research of foreign language teachers in Bangkok government secondary schools. Bangkok:Mahidol University, 1989.

Anchalee Wannaruk. (1989) An investigation into the research of foreign language teachers in Bangkok government secondary schools (รายงานผลงานวิจัย). Mahidol University:Bangkok.