Rananda Rungnaphawet และ Nirada Simargool. (2007) The syntactic variation of English adverbs in the interlanguage of Thai learners. Chulalongkorn University:ม.ป.ท.Rananda Rungnaphawet และ Nirada Simargool. 2007. The syntactic variation of English adverbs in the interlanguage of Thai learners. ม.ป.ท.:Chulalongkorn University;Rananda Rungnaphawet และ Nirada Simargool. The syntactic variation of English adverbs in the interlanguage of Thai learners. ม.ป.ท.:Chulalongkorn University, 2007. Print.