Sandriani, Putri, and Kartini Harahap. 2023. “The Effect Of Work Discipline And Work Supervision On Work Productivity Of BPJS Ketenagakerjaan Employees In North Medan Branch”. Jurnal Sosial Sains Dan Komunikasi 1 (02):39-52. https://doi.org/10.58471/ju-sosak.v1i02.97.