Thanyawit Wuthisawangwong และ Sumalee Chinokul. (2016) EFFECTS OF CONTENT-BASED INSTRUCTION USING SIX-T'S APPROACH ON ENGLISH ORAL PRESENTATION SKILLS OF LOWER SECONDARY SCHOOL STUDENTS. Chulalongkorn University:ม.ป.ท.Thanyawit Wuthisawangwong และ Sumalee Chinokul. 2016. EFFECTS OF CONTENT-BASED INSTRUCTION USING SIX-T'S APPROACH ON ENGLISH ORAL PRESENTATION SKILLS OF LOWER SECONDARY SCHOOL STUDENTS. ม.ป.ท.:Chulalongkorn University;Thanyawit Wuthisawangwong และ Sumalee Chinokul. EFFECTS OF CONTENT-BASED INSTRUCTION USING SIX-T'S APPROACH ON ENGLISH ORAL PRESENTATION SKILLS OF LOWER SECONDARY SCHOOL STUDENTS. ม.ป.ท.:Chulalongkorn University, 2016. Print.