ตันติกร ทิพย์จุฑา. “A STUDY OF THE EFFICENCY OF PUBLIC OF SERVICES OF KHAO PHRA NGAM MUNICIPALITY LOP BURI PROVINCE”. Journal of Research and Development Institute Rajabhat Maha Sarakham University 7, no. 1 (June 30, 2020): 503–512. Accessed May 7, 2024. https://so03.tci-thaijo.org/index.php/rdirmu/article/view/242783.