sreesuknam, kitichai. “Retailer’s Professional Competency of Managers and Organizational Efficiency”. University of the Thai Chamber of Commerce Journal Humanities and Social Sciences 41, no. 2 (June 18, 2021): 18–33. accessed April 8, 2025. https://so06.tci-thaijo.org/index.php/utccjournalhs/article/view/244520.