Jing Liang, Kanchaya Chaivirutnukul, and Nan Zhao. “WHY ARE PROACTIVE EMPLOYEES ALWAYS CREATIVE? A PERSPECTIVE FROM THE DELAY OF GRATIFICATION”. The Journal of Modern Project Management 11, no. 2 (October 23, 2023): 254–269. Accessed July 22, 2024. https://journalmodernpm.com/manuscript/index.php/jmpm/article/view/681.