Sudawan Aum-aung. (1999) Organizational commitment of personnel working at Thai food and drug administration. Mahidol University,:ม.ป.ท.Sudawan Aum-aung. 1999. Organizational commitment of personnel working at Thai food and drug administration. ม.ป.ท.:Mahidol University,;Sudawan Aum-aung. Organizational commitment of personnel working at Thai food and drug administration. ม.ป.ท.:Mahidol University, 1999. Print.