Sandriani, P., & Harahap, K. (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