Rachitrat Vudhikamraksa และ Preeyachat Uttamayodhin. (2009) Rating opinions on violent online games between elementary pupils and high-school students in Bangkok. Thammasat University:ม.ป.ท.Rachitrat Vudhikamraksa และ Preeyachat Uttamayodhin. 2009. Rating opinions on violent online games between elementary pupils and high-school students in Bangkok. ม.ป.ท.:Thammasat University;Rachitrat Vudhikamraksa และ Preeyachat Uttamayodhin. Rating opinions on violent online games between elementary pupils and high-school students in Bangkok. ม.ป.ท.:Thammasat University, 2009. Print.