เกษมสถิตย์วงศ์ วราพร. 2018. “FACTORS EFFECTING ON STUDENT’S SELF-DISCIPLINE OF BACHELOR OF DEGREE AT RAMKHAMHAENG UNIVERSITY”. Journal of Yanasangvorn Research Institute Mahamakut Buddhist University 9 (1):111-24. https://so04.tci-thaijo.org/index.php/yri/article/view/173312.