MUHAMMAD ALFITRA SIREGAR; NOVRIHAN LEILY NASUTION; AULIA INDRA. PENGARUH KOORDINASI TERHADAP PENINGKATAN PRODUKTIVITAS KERJA PEGAWAI PADA KANTOR DINAS TENAGA KERJA LABUHANBATU. JOEL: Journal of Educational and Language Research, [S. l.], v. 1, n. 12, p. 2141–2152, 2022. DOI: 10.53625/joel.v1i12.3019. Disponível em: https://bajangjournal.com/index.php/JOEL/article/view/3019. Acesso em: 15 jul. 2025.