Choocheep, K., C. Usaho, and P. Siribanpitak. “A Proposed Organizational Structure Model of The Civil Service Training Institute to Enhance The Quality of Workforce in The Public Sector”. Scholar: Human Sciences, vol. 8, no. 1, June 2016, p. 159, http://www.assumptionjournal.au.edu/index.php/Scholar/article/view/2193.