“THE ROLE OF THE ALL-INDONESIAN TRADE UNION (SPSI) IN REALIZED WORKERS’ WELFARE IN PADANG HILIR DISTRICT, TEBING TINGGI CITY”. OPINI: Journal of Communication and Social Science 2, no. 2 (July 31, 2025): 60–69. Accessed October 1, 2025. https://journal.aspublisher.co.id/index.php/opini/article/view/871.