Pakvipas, P., K. Nithisathian, R. Pongwiritthon, and S. Chongesiriroj. “The Study Guidelines for Problem, Obstacle and Criteria Indicator to Operate The Excellence: The Case Study of The Center of Excellence, Rajamangala University of Technology Lanna, Chiang Mai”. RMUTL Journal of Business Administration and Liberal Arts, vol. 5, no. 1, June 2017, pp. 97-110, https://so05.tci-thaijo.org/index.php/balajhss/article/view/94724.