Nguyen, H.T. and Tran, B.V. 2019. Factors Influencing Middle Level Managers’ Motivation: An Empirical Study of Small and Medium Enterprises in Vietnam. The International Journal of Business & Management. 7, 10 (Oct. 2019). DOI:https://doi.org/10.24940/theijbm/2019/v7/i10/BM1910-085.