LUBIS, F. H. Factors That Affect Employee Effectiveness and Efficiency at PT. Bandar Sumatra Indonesia. Journal of Management Science (JMAS), [S. l.], v. 2, n. 3, Juli, p. 72–76, 2019. Disponível em: https://exsys.iocspublisher.org/index.php/JMAS/article/view/35. Acesso em: 18 apr. 2026.