ANALISIS KETERAMPILAN DAN KESEHATAN TERHADAP PRODUKTIVITAS TENAGA KERJA PTPN II SEI SEMAYANG. JOURNAL OF SCIENCE AND SOCIAL RESEARCH, [S. l.], v. 7, n. 4, p. 1933–1942, 2024. DOI: 10.54314/jssr.v7i4.2309. Disponível em: https://jurnal.goretanpena.com/index.php/JSSR/article/view/2309.. Acesso em: 13 apr. 2026.