Phansawat, K. and Auraiwan, D. (2024) “The internal environment that affects operational efficiency. A case study of Prasat Thong Subdistrict Municipality Bang Pa-in District Phra Nakhon Si Ayutthaya Province”, Journal of Public Administration Chiang Rai Rajabhat University. Chiangrai, Thailand, 7(2), pp. 61–80. available at: https://so16.tci-thaijo.org/index.php/POPACRRU/article/view/898 (accessed: 18 April 2025).