TAMBUNAN, E.; ZAINARTI, Z. Analysis of Service Quality Levels for Social Security Administrator (BPJS) Participants and non-BPJS (Case Study of Ofa Padang Mahondang Village). Indonesian Interdisciplinary Journal of Sharia Economics (IIJSE), v. 6, n. 3, p. 1500-1518, 1 ago. 2023.