Taoklang, Kotchaporn, Kanokon Boonmee, and Dakanda Arunmala. 2018. “Performance Efficiency Affecting Organizational Loyalty of Staffs in Private Higher Educational Institutions in KhonKaen Province”. Dhammathas Academic Journal 17 (3):255-62. https://so06.tci-thaijo.org/index.php/dhammathas/article/view/101473.