กาญจนาโภคิน กรเอก. 2016. “Proficiency Development Project of Personal Responsible for Training and Testing the Driving License Applicants for the Fiscal Year 2555”. Journal of Humanities and Social Sciences, Rajapruk University 1 (3):36-47. https://so03.tci-thaijo.org/index.php/rpu/article/view/112367.