Natchaya Chalaysap. 1993. The technique of word analysis. Bangkok:National Institute of Development Administration;
Natchaya Chalaysap. (1993) The technique of word analysis (รายงานผลงานวิจัย). National Institute of Development Administration:Bangkok.
Natchaya Chalaysap. The technique of word analysis. Bangkok:National Institute of Development Administration, 1993.
Natchaya Chalaysap. (1993) The technique of word analysis (รายงานผลงานวิจัย). National Institute of Development Administration:Bangkok.