Chaichan, T., K. Chaichan, and C. Silapa-a-nant. “Cost Analysis and return of community drinking water moo.1 in Maklua Mai, Sung Nern District, Nakhon Ratchasima Province”. Journal of Management Science Nakhonratchasima University, vol. 2, no. 1, June 2023, pp. 29-47, https://so08.tci-thaijo.org/index.php/jmsnrru/article/view/1196.