Ratchadaporn Janudom และ Punchalee Wasanasomsithi. (2009) The development of an English instructional model using the integration of drama and questioning techniques to enhance students' speaking achievement and critical thinking skill. Chulalongkorn University:ม.ป.ท.Ratchadaporn Janudom และ Punchalee Wasanasomsithi. 2009. The development of an English instructional model using the integration of drama and questioning techniques to enhance students' speaking achievement and critical thinking skill. ม.ป.ท.:Chulalongkorn University;Ratchadaporn Janudom และ Punchalee Wasanasomsithi. The development of an English instructional model using the integration of drama and questioning techniques to enhance students' speaking achievement and critical thinking skill. ม.ป.ท.:Chulalongkorn University, 2009. Print.