Kongkaew , Suphawinee, and Tanastha Rojanatrakul. “Factors an affecting the commitment of personnel under the Royai Institute, Phitsanulok Province”. Journal of Modern Learning Development 6, no. 3 (May 10, 2021): 209–223. accessed August 27, 2026. https://so06.tci-thaijo.org/index.php/jomld/article/view/247949.