Sangnaimueang, S., & Cherdjirapong, K. (2022). Guidelines for Developing Public Relations Efficiency of Nakhon Ratchasima Municipality, Nakhon Ratchasima Province . Journal of Research and Development Institute Rajabhat Maha Sarakham University, 9(1), 225–242. Retrieved from https://so03.tci-thaijo.org/index.php/rdirmu/article/view/254671