Saroj Changpien. (2004) <The> study of factors affecting labors' decision making to enrol in the national skill standard test : case study of labors in the accredited garages. Mahidol University,:ม.ป.ท.Saroj Changpien. 2004. <The> study of factors affecting labors' decision making to enrol in the national skill standard test : case study of labors in the accredited garages. ม.ป.ท.:Mahidol University,;Saroj Changpien. <The> study of factors affecting labors' decision making to enrol in the national skill standard test : case study of labors in the accredited garages. ม.ป.ท.:Mahidol University, 2004. Print.