Heo, ChangGoo. “The Influences of Self-Improvement Motivation and Obsessive Self-Improvement on Psychological State of Undergraduate Student”. Korean Journal of Industrial and Organizational Psychology 33, no. 1 (February 28, 2020): 93–117. Accessed November 21, 2024. https://journal.ksiop.or.kr/index.php/KJIOP/article/view/301.