Warangkana Monawong. (2007) Problem of ethnicity :. Faculty of Political Science, Thammasat University,:ม.ป.ท.Warangkana Monawong. 2007. Problem of ethnicity :. ม.ป.ท.:Faculty of Political Science, Thammasat University,;Warangkana Monawong. Problem of ethnicity :. ม.ป.ท.:Faculty of Political Science, Thammasat University, 2007. Print.