Thadrong, N. ., K. Duangchatom, and P. Phoojomjit. “Program Development Collaborative Leadership of Administrators under Mahasarakham Provincial Administration Organization”. Journal of Research and Development Institute Rajabhat Maha Sarakham University, vol. 8, no. 1, Apr. 2021, pp. 329-46, https://so03.tci-thaijo.org/index.php/rdirmu/article/view/242435.