Sumrit Yipyintum. (2014) The Conceptual Framework: The Quality of Work Life and Employee Engagement in an Organization that Has Adopted the Guideline for Adopting the Philosophy of Sufficiency Economy in the Industrial Sector. <i>NIDA Development Journal</i>, <i>54</i>(4), 154-186.Sumrit Yipyintum. "The Conceptual Framework: The Quality of Work Life and Employee Engagement in an Organization that Has Adopted the Guideline for Adopting the Philosophy of Sufficiency Economy in the Industrial Sector". NIDA Development Journal 54 (2014):154-186.Sumrit Yipyintum. The Conceptual Framework: The Quality of Work Life and Employee Engagement in an Organization that Has Adopted the Guideline for Adopting the Philosophy of Sufficiency Economy in the Industrial Sector. National Institute of Development Administration:ม.ป.ท. 2014.