บุญเรืองจักร วรารัตน์. 2016. “The Relationship Between Self-Practice Following The Principles of Iddhipãda And Work Performance Effectiveness of Officials at Department”. Journal of Graduate MCU KhonKaen Campus 3 (1):24-35. https://so02.tci-thaijo.org/index.php/jg-mcukk/article/view/243148.