Thitiporn Mongdee และ Lamai Romyen; Chardchai Udomkijmongkol. (2022) Happiness at Work Affecting Performance Effectiveness of the Personnel of Sakon Nakhon Provincial Administration Department, Interior Ministry. <i>Interdisciplinary Academic and Research Journal</i>, <i>2</i>(5), 691-712.Thitiporn Mongdee และ Lamai Romyen; Chardchai Udomkijmongkol. "Happiness at Work Affecting Performance Effectiveness of the Personnel of Sakon Nakhon Provincial Administration Department, Interior Ministry". Interdisciplinary Academic and Research Journal 2 (2022):691-712.Thitiporn Mongdee และ Lamai Romyen; Chardchai Udomkijmongkol. Happiness at Work Affecting Performance Effectiveness of the Personnel of Sakon Nakhon Provincial Administration Department, Interior Ministry. DR.KEN Institute of Academic Development and Promotion:ม.ป.ท. 2022.