Nguyen, Huong Thanh, and Binh Van Tran. “Factors Influencing Middle Level Managers’ Motivation: An Empirical Study of Small and Medium Enterprises in Vietnam”. The International Journal of Business & Management 7, no. 10 (October 31, 2019). Accessed July 22, 2024. https://internationaljournalcorner.com/index.php/theijbm/article/view/149442.