Ploysongsang Panpothong. 2006. The understanding and application of the communicative language teaching approach of secondary school teachers in Nakhonpathom educational service area. Field of Study Teaching English as a Foreign Language, Chulalongkorn University;
Ploysongsang Panpothong. (2006) The understanding and application of the communicative language teaching approach of secondary school teachers in Nakhonpathom educational service area . Chulalongkorn University/Bangkok.
Ploysongsang Panpothong. The understanding and application of the communicative language teaching approach of secondary school teachers in Nakhonpathom educational service area. . Bangkok:Chulalongkorn University, 2006.
Ploysongsang Panpothong. (2006) The understanding and application of the communicative language teaching approach of secondary school teachers in Nakhonpathom educational service area . Chulalongkorn University/Bangkok.