Nongnaphat Phanphonlakrit และ Chatchai Sirikulpan. (2017) Factor Analysis of Ethical Mind for Vocational Students in Chiang Mai Thailand. <i>Journal of Community Development and Life Quality</i>, <i>5</i>(3), 471-488.Nongnaphat Phanphonlakrit และ Chatchai Sirikulpan. "Factor Analysis of Ethical Mind for Vocational Students in Chiang Mai Thailand". Journal of Community Development and Life Quality 5 (2017):471-488.Nongnaphat Phanphonlakrit และ Chatchai Sirikulpan. Factor Analysis of Ethical Mind for Vocational Students in Chiang Mai Thailand. Upper Northern Reserch Administration Network:ม.ป.ท. 2017.