ABD FATAH DAFHI PUTRA WENDI; ABD. RASYID SYAMSURI; PRIMA ANDREAS. Employee Productivity in the Palm Oil Industry: The Role of Vertical Communication, Work Discipline, and Intrinsic Motivation. International Journal of Science and Environment (IJSE), [S. l.], v. 6, n. 2, p. 644–653, 2026. DOI: 10.51601/ijse.v6i2.544. Disponível em: https://ijsenet.com/index.php/IJSE/article/view/544. Acesso em: 22 may. 2026.