Phomsena, T., and Phrakrusoponkittibundit. “An effectiveness of problem management of people complained towards Damrongdhama center of Phrae province”. Journal of Lanna Societies, vol. 1, no. 4, Dec. 2023, pp. 40-49, https://so13.tci-thaijo.org/index.php/jls/article/view/305.