Kongkasai, K., C. Intarak, and R. Natthunatiruj. “Development of Promoting Morale Model in Teacher Performance Under the Secondary Educational Service Area Office Ratchaburi”. Journal of Graduate MCU KhonKaen Campus, vol. 12, no. 1, Mar. 2025, pp. 179-91, https://so02.tci-thaijo.org/index.php/jg-mcukk/article/view/273585.