Kaewwichit, Hatsadin. 2016. “A Study of Antecedents and Consequences of Academic Motivation of Rajabhat University Students in Upper Northeastern Provinces: A Testing of Self-Determination Theory”. The Periodical of Behavioral Science 22 (2):49-64. https://so06.tci-thaijo.org/index.php/BSRI/article/view/39916.