Sarinya Phungphaophan และ Virasuda Sribayak. (2007) An analysis of English textbook, super goal 1, for grade 7 students. Language Institute, Thammasat University,:ม.ป.ท.Sarinya Phungphaophan และ Virasuda Sribayak. 2007. An analysis of English textbook, super goal 1, for grade 7 students. ม.ป.ท.:Language Institute, Thammasat University,;Sarinya Phungphaophan และ Virasuda Sribayak. An analysis of English textbook, super goal 1, for grade 7 students. ม.ป.ท.:Language Institute, Thammasat University, 2007. Print.