ANSY, Dayat; MUHAMMAD ARIF; NURWANI. Pengaruh Pengaruh Audit Operasional dan Pengendalian Internal Terhadap Efektivitas Pelayanan Pada Perusahaan Daerah Air Minum (PDAM) Tirtanadi Kota Medan. Journal Research of Economic and Bussiness, [S. l.], v. 3, n. 01, p. 30–46, 2024. DOI: 10.55537/jreb.v3i01.749. Disponível em: https://journal.aira.or.id/index.php/j-reb/article/view/749. Acesso em: 14 sep. 2025.