Jessada Koo-ngammak และ Pachitianut Siripanich. (2014) Work Stress of Instructors in State Universities. <i>NIDA Development Journal</i>, <i>54</i>(1), 259-285.Jessada Koo-ngammak และ Pachitianut Siripanich. "Work Stress of Instructors in State Universities". NIDA Development Journal 54 (2014):259-285.Jessada Koo-ngammak และ Pachitianut Siripanich. Work Stress of Instructors in State Universities. National Institute of Development Administration:ม.ป.ท. 2014.