Pulungan, Delyana R., et al. “IDENTIFICATION OF FACTORS INFLUENCING EMPLOYEE WORK PRODUCTIVITY IN OIL PALM PLANTATIONS”. International Journal of Economic, Technology and Social Sciences (Injects), vol. 6, no. 1, May 2025, pp. 139–147, https://www.jurnal.ceredindonesia.or.id/index.php/injects/article/view/1324.