Suphaphon Tateum และ Thipamas Chumworatayee. (2007) A case study of the implementation of semantic mapping as a pre-teaching vocabolary activity to 2nd year English major students at Lampang Rajabhat University. Language Institute, Thammasat University,:ม.ป.ท.Suphaphon Tateum และ Thipamas Chumworatayee. 2007. A case study of the implementation of semantic mapping as a pre-teaching vocabolary activity to 2nd year English major students at Lampang Rajabhat University. ม.ป.ท.:Language Institute, Thammasat University,;Suphaphon Tateum และ Thipamas Chumworatayee. A case study of the implementation of semantic mapping as a pre-teaching vocabolary activity to 2nd year English major students at Lampang Rajabhat University. ม.ป.ท.:Language Institute, Thammasat University, 2007. Print.