Yanika Lunrasri และ Chansongklod Gajaseni. (2014) WASHBACK EFFECTS OF THE ORDINARY NATIONAL EDUCATIONAL TEST (O-NET) ON ENGLISH LANGUAGE TEACHING AND LEARNING IN NINTH GRADE. Chulalongkorn University:ม.ป.ท.Yanika Lunrasri และ Chansongklod Gajaseni. 2014. WASHBACK EFFECTS OF THE ORDINARY NATIONAL EDUCATIONAL TEST (O-NET) ON ENGLISH LANGUAGE TEACHING AND LEARNING IN NINTH GRADE. ม.ป.ท.:Chulalongkorn University;Yanika Lunrasri และ Chansongklod Gajaseni. WASHBACK EFFECTS OF THE ORDINARY NATIONAL EDUCATIONAL TEST (O-NET) ON ENGLISH LANGUAGE TEACHING AND LEARNING IN NINTH GRADE. ม.ป.ท.:Chulalongkorn University, 2014. Print.