Andreansyah, Eka, and Friska Anggraini Barus. “Pengaruh Disiplin Kerja Dan Status Kerja Terhadap Produktivitas Pemanen Di PT Perkebunan Nusantara IV Afdeling 3 Kebun Dolok Ilir ”. Ranah Research : Journal of Multidisciplinary Research and Development 8, no. 4 (June 11, 2026): 2129-2142. Accessed June 11, 2026. https://jurnal.ranahresearch.com/index.php/R2J/article/view/2145.