บุญวรรณ ส. (2019) “ Locus of Control and the Psychological Well-Being of Registered Nurses at Piyavate Hospital”., Pathumthani University Academic Journal, 11(1), pp. 187–196. available at: https://so05.tci-thaijo.org/index.php/ptujournal/article/view/187069 (accessed: 29 September 2026).