PURWANTO, R Hari. PELAKSANAAN SISTEM KERJA OUTSOURCING DI KABUPATEN GRESIK. Jurnal Pro Hukum: Jurnal Penelitian Bidang Hukum Universitas Gresik, [S. l.], v. 4, n. 2, 2015. DOI: 10.55129/jph.v4i2.497. Disponível em: https://journal.unigres.ac.id/index.php/JurnalProHukum/article/view/497. Acesso em: 30 apr. 2026.