Naranut Karakhuen และ Sathirakorn Pongpanich. (2003) Effects of health education program on preoperative anxiety among abdominal surgical patientsc. Chulalongkorn University:ม.ป.ท.Naranut Karakhuen และ Sathirakorn Pongpanich. 2003. Effects of health education program on preoperative anxiety among abdominal surgical patientsc. ม.ป.ท.:Chulalongkorn University;Naranut Karakhuen และ Sathirakorn Pongpanich. Effects of health education program on preoperative anxiety among abdominal surgical patientsc. ม.ป.ท.:Chulalongkorn University, 2003. Print.