Wirayut Phonphotthanamat. (2011) A Study of the Overview of the Problems of Contracted Teachers in Schools under the Administration of Bangkok Educational Service Area Office 3. <i>Journal of Public and Private Management</i>, <i>18</i>(1), 163.Wirayut Phonphotthanamat. "A Study of the Overview of the Problems of Contracted Teachers in Schools under the Administration of Bangkok Educational Service Area Office 3". Journal of Public and Private Management 18 (2011):163.Wirayut Phonphotthanamat. A Study of the Overview of the Problems of Contracted Teachers in Schools under the Administration of Bangkok Educational Service Area Office 3. School of Public Administration, National Instituteof Development Administration (NIDA):ม.ป.ท. 2011.