Jongsuksomsakul, Panida. “Efficiency and Effectiveness of the Public Relations Department Region 4 in Thailand”. University of the Thai Chamber of Commerce Journal Humanities and Social Sciences 36, no. 1 (January 1, 2018): 82–98. accessed September 17, 2026. https://so06.tci-thaijo.org/index.php/utccjournalhs/article/view/180528.