Nattapong Boupen, Amnuay Thongprong. “Teachers’ Opinions Concerning the Role of Administrators in Moral School Development Under the Nakhon Nayok Primary Educational Service Area Office”. Doctor of Philosophy in Social Sciences Journal, vol. 1, no. 3, Dec. 2022, pp. 15-26, https://so08.tci-thaijo.org/index.php/dpssj/article/view/1335.