LAKSHMITA, S. .; SIMANJORANG, Y. R. A. .; FANGESTU, F. .; MIRZA, D. F. . Effect of Age, Length of Service and Education on Employee Productivity PT Jasa Raharja Medan. International Journal Of Economics Social And Technology , [S. l.], v. 3, n. 4, p. 135–141, 2024. DOI: 10.59086/ijest.v3i4.72. Disponível em: https://jurnal.risetilmiah.ac.id/index.php/ijest/article/view/72. Acesso em: 13 apr. 2025.