Saengchan Hemchua. (2012) Assessing Knowledge and Use of English Vocabulary. <i>NIDA Development Journal</i>, <i>52</i>(4), 55-88.Saengchan Hemchua. "Assessing Knowledge and Use of English Vocabulary". NIDA Development Journal 52 (2012):55-88.Saengchan Hemchua. Assessing Knowledge and Use of English Vocabulary. National Institute of Development Administration:ม.ป.ท. 2012.