PARAPAT, J. . The Existence Of PT Jamsostek In Social Security Services For Participant Time Working Agreements (PKWT) ( Study at PT Jamsostek (Persero) Belawan Branch). Journal of Law Science, [S. l.], v. 2, n. 2, p. 69-78, 2020. DOI: 10.35335/jls.v2i2.1619. Disponível em: https://iocscience.org/ejournal/index.php/JLS/article/view/1619. Acesso em: 26 apr. 2026.