Bonrod, T. and Wangthanomsak, M. . (2021) “The Servant Leadership of School Administrator and Quality of Work Life of Teacher under the Secondary Educational Service Area Office 9”, Arts of Management Journal. Bangkok, Thailand, 5(2), pp. 486–500. available at: https://so02.tci-thaijo.org/index.php/jam/article/view/248920 (accessed: 7 December 2025).