Payan Eumsin. (2015) The management and governance of Thai social security office. National Institute of Development Administration:ม.ป.ท.Payan Eumsin. 2015. The management and governance of Thai social security office. ม.ป.ท.:National Institute of Development Administration;Payan Eumsin. The management and governance of Thai social security office. ม.ป.ท.:National Institute of Development Administration, 2015. Print.