Srithonrach, Boonchaung. 2018. “Effect of Accounting Expertise on Work Efficiency of Accountant Business in Roi-Kaen-Sarn-Sin Province Group”. Journal of Management Science Chiangrai Rajabhat University 13 (2):103-24. https://so03.tci-thaijo.org/index.php/jmscrru/article/view/148178.